Dynamic Mesh Cfd And Its Application To Flapping Wing Micro Air Vehicles

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Dynamic-Mesh CFD and Its Application to Flapping-Wing Micro-Air Vehicles

Author :
Publisher :
ISBN 13 :
Total Pages : 29 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Dynamic-Mesh CFD and Its Application to Flapping-Wing Micro-Air Vehicles by :

Download or read book Dynamic-Mesh CFD and Its Application to Flapping-Wing Micro-Air Vehicles written by and published by . This book was released on 2006 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are currently developing new numerical simulation methods and computational fluid dynamics (CFD) codes designed for advanced fluid-structure interaction (FSI) applications that have moving mechanical components and/or changing domain shapes. The method is called Dynamic-Mesh (DM) and is currently being implemented in parallel within our XFlow CFD simulation code. This method involves the tight coupling of automatic mesh generation (AMG) technology with more traditional parallel CFD methods designed for unstructured meshes. By coupling these two distinct technologies together, the mesh generation process never stops and continues throughout the entire simulation. By doing this, we can define a so-called "dynamic" mesh that has the ability to adjust, change, and modify its structure in response to any changes in geometry or other factors. DM-CFD technology of XFlow can be used to model the fluid flow around or within flapping-wing vehicles, rotorcraft, engines, turbines, pumps, airdrop systems, and has applicability to modeling free-surface flow, fluid-particle flow, energy/nuclear systems, and many bio-medical applications. Traditionally, these are some of the most difficult applications to simulate. We are currently demonstrating and testing the DM technique and the capabilities of XFlow through a series of complex FSI applications. These applications include the simulation of airdrop systems involving the deployment (i.e. opening) of parachutes, bio-medical applications, and the simulation of micro air vehicles (MAV) and biological systems. Results of the modeling of a flapping-wing MAV will be highlighted here to demonstrate the capabilities and potential of the DM method in XFlow, as well as providing some illustrative results for an interesting application.

CFD Based Aerodynamic Modeling to Study Flight Dynamics of a Flapping Wing Micro Air Vehicle

Author : Alok Ashok Rege
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (823 download)

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Book Synopsis CFD Based Aerodynamic Modeling to Study Flight Dynamics of a Flapping Wing Micro Air Vehicle by : Alok Ashok Rege

Download or read book CFD Based Aerodynamic Modeling to Study Flight Dynamics of a Flapping Wing Micro Air Vehicle written by Alok Ashok Rege and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The demand for small unmanned air vehicles, commonly termed micro air ve- hicles or MAV's, is rapidly increasing. Driven by applications ranging from civil search-and-rescue missions to military surveillance missions, there is a rising level of interest and investment in better vehicle designs, and miniaturized components are enabling many rapid advances. The need to better understand fundamental aspects of ight for small vehicles has spawned a surge in high quality research in the area of micro air vehicles. These aircraft have a set of constraints which are, in many ways, considerably di erent from that of traditional aircraft and are often best addressed by a multidisciplinary approach. Fast-response non-linear controls, nano-structures, in- tegrated propulsion and lift mechanisms, highly exible structures, and low Reynolds aerodynamics are just a few of the important considerations which may be combined in the execution of MAV research. The main objective of this thesis is to derive a consistent nonlinear dynamic model to study the ight dynamics of micro air vehicles with a reasonably accurate representation of aerodynamic forces and moments. The research is divided into two sections. In the rst section, derivation of the nonlinear dynamics of apping wing micro air vehicles is presented. The apping wing micro air vehicle (MAV) used in this research is modeled as a system of three rigid bodies: a body and two wings. The design is based on an insect called Drosophila Melanogaster, commonly known as fruit- y. The mass and inertial e ects of the wing on the body are neglected for the present work. The nonlinear dynamics is simulated with the aerodynamic data published in the open literature. The apping frequency is used as the control input. Simulations are run for di erent cases of wing positions and the chosen parameters are studied for boundedness. Results show a qualitative inconsistency in boundedness for some cases, and demand a better aerodynamic data. The second part of research involves preliminary work required to generate new aerodynamic data for the nonlinear model. First, a computational mesh is created over a 2-D wing section of the MAV model. A nite volume based computational ow solver is used to test di erent apping trajectories of the wing section. Finally, a parametric study of the results obtained from the tests is performed.

Computational Investigation of Flapping-Wing Propulsion for a Micro-Air Vehicle

Author : Seng Chuan Lim
Publisher :
ISBN 13 :
Total Pages : 109 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Computational Investigation of Flapping-Wing Propulsion for a Micro-Air Vehicle by : Seng Chuan Lim

Download or read book Computational Investigation of Flapping-Wing Propulsion for a Micro-Air Vehicle written by Seng Chuan Lim and published by . This book was released on 2006 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: The low Reynolds number aerodynamics of the flapping wing Micro-Air Vehicle (MAV) developed at NPS by Max Platzer and Kevin Jones was studied numerically. The dynamic mesh simulation model of the full multi-wing configuration, which consists of a fixed wing and a pair of aft position, opposed pitch/ plunge flapping wings was developed using an advanced CFD code that is available commercially. The unsteady flow fields, wake structures and forces were determined by solving the incompressible Navier-Stokes equations, and the results were compared to past experimental observations. The results were encouraging and provided impetus for future computational optimization studies on the NPS flapping wing MAV.

Flapping Wing Vehicles

Author : Lung-Jieh Yang
Publisher : CRC Press
ISBN 13 : 1000442624
Total Pages : 427 pages
Book Rating : 4.0/5 (4 download)

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Book Synopsis Flapping Wing Vehicles by : Lung-Jieh Yang

Download or read book Flapping Wing Vehicles written by Lung-Jieh Yang and published by CRC Press. This book was released on 2021-09-30 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flapping wing vehicles (FWVs) have unique flight characteristics and the successful flight of such a vehicle depends upon efficient design of the flapping mechanisms while keeping the minimum weight of the structure. Flapping Wing Vehicles: Numerical and Experimental Approach discusses design and kinematic analysis of various flapping wing mechanisms, measurement of flap angle/flapping frequency, and computational fluid dynamic analysis of motion characteristics including manufacturing techniques. The book also includes wind tunnel experiments, high-speed photographic analysis of aerodynamic performance, soap film visualization of 3D down washing, studies on the effect of wing rotation, figure-of-eight motion characteristics, and more. Features Covers all aspects of FWVs needed to design one and understand how and why it flies Explains related engineering practices including flapping mechanism design, kinematic analysis, materials, manufacturing, and aerodynamic performance measures using wind tunnel experiments Includes CFD analysis of 3D wing profile, formation flight of FWVs, and soap film visualization of flapping wings Discusses dynamics and image-based control of a group of ornithopters Explores indigenous PCB design for achieving altitude and attitude control This book is aimed at researchers and graduate students in mechatronics, materials, aerodynamics, robotics, biomimetics, vehicle design and MAV/UAV.

Catalytic Methods in Flow Chemistry

Author : Christophe Len
Publisher : MDPI
ISBN 13 : 303928732X
Total Pages : 158 pages
Book Rating : 4.0/5 (392 download)

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Book Synopsis Catalytic Methods in Flow Chemistry by : Christophe Len

Download or read book Catalytic Methods in Flow Chemistry written by Christophe Len and published by MDPI. This book was released on 2020-04-15 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemical industry is essential in the daily humn life of modern society; despite the misconception about the real need for chemical production, everyone enjoys the benefit of the chemical progress. However, the chemical industry generates a large variety of products, including (i) basic chemicals, e.g., polymers, petrochemicals, and basic inorganics; (ii) specialty chemicals for crop protection, paints, inks, colorants, textiles, paper, and engineering; and (iii) consumer chemicals, including detergents, soaps, etc. For these reasons, chemists in both acdemia and industry are challenged with developing green and sustainable chemical production towrad the full-recycling of feedstocks and waste. Aiming to improve the intensification of the process, chemists have established chemical reactions based on catalysis, as well as alternative technologies, such as continuous flow. The aim of this book is to cover promising recent research and novel trends in the field of novel catalytic reactions (homogeneous, heterogeneous, and enzymatic, as well as their combinations) in continuous flow conditions. A collection of recent contribution for conversion of starting material originated from petroleum resources or biomass into highly-added value chemicals are reported.

Fixed and Flapping Wing Aerodynamics for Micro Air Vehicle Applications

Author : Thomas J. Mueller
Publisher : AIAA
ISBN 13 : 9781600864469
Total Pages : 614 pages
Book Rating : 4.8/5 (644 download)

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Book Synopsis Fixed and Flapping Wing Aerodynamics for Micro Air Vehicle Applications by : Thomas J. Mueller

Download or read book Fixed and Flapping Wing Aerodynamics for Micro Air Vehicle Applications written by Thomas J. Mueller and published by AIAA. This book was released on 2001 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title reports on the latest research in the area of aerodynamic efficency of various fixed-wing, flapping wing, and rotary wing concepts. It presents the progress made by over fifty active researchers in the field.

An Experimental and Numerical Investigation of Flapping and Plunging Wings

Author : Taylor Alexander Swanson
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (53 download)

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Book Synopsis An Experimental and Numerical Investigation of Flapping and Plunging Wings by : Taylor Alexander Swanson

Download or read book An Experimental and Numerical Investigation of Flapping and Plunging Wings written by Taylor Alexander Swanson and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Micro air vehicles, or MAVs, are of current interest for a multitude of uses to which they, being small, unmanned vehicles, are uniquely suited. Among the proposed uses are exploration, reconnaissance, and communications. They can be deployed inside buildings, where their small size, hovering capability, and maneuverability, are important factors. Due to their small size, they operate at low Reynolds numbers where conventional flying mechanisms are not advantageous. Thus, attempts have been made to learn from natural flyers like insects and birds. Natural flight is accomplished by flapping wings, and this idea has been proposed for certain types of MAVs termed ornithopters and entomopters. This dissertation investigates the aerodynamics applicable to low Reynolds number unsteady flow, and consists of four stages. The first stage is CFD for fixed wings at low Reynolds number. In the second and third stage, experiments are conducted on flapping and plunging wings. The final stage consists of dynamic mesh CFD for a plunging airfoil"--Abstract, leaf iii

Comprehensive Modeling and Control of Flexible Flapping Wing Micro Air Vehicles

Author : Stephen Michael Nogar
Publisher :
ISBN 13 :
Total Pages : 197 pages
Book Rating : 4.:/5 (94 download)

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Book Synopsis Comprehensive Modeling and Control of Flexible Flapping Wing Micro Air Vehicles by : Stephen Michael Nogar

Download or read book Comprehensive Modeling and Control of Flexible Flapping Wing Micro Air Vehicles written by Stephen Michael Nogar and published by . This book was released on 2015 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work highlights the importance of coupled dynamics in the design and control of flapping wing micro air vehicles. Future enhancements to this work should focus on the reduced order structural and aerodynamics models. Applications include using the developed dynamics model to evaluate other kinematics and control schemes, ultimately enabling improved vehicle and control design.

Investigation of Numerical Approaches to Analyze Flapping Wings

Author : Nitin Bhagat
Publisher :
ISBN 13 :
Total Pages : 158 pages
Book Rating : 4.:/5 (855 download)

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Book Synopsis Investigation of Numerical Approaches to Analyze Flapping Wings by : Nitin Bhagat

Download or read book Investigation of Numerical Approaches to Analyze Flapping Wings written by Nitin Bhagat and published by . This book was released on 2011 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: For centuries, the agility and maneuverability of flying insects have been an inspiration to fluid dynamists. A large number of research activities have been conducted within the biological, aerodynamics, and computational science communities to understand the complex flow fields around flapping insects and their capability for rapid maneuvers. However, the understanding of these natural phenomena is still in its infancy. Recent experimental flow visualizations have shown the complex vortical structures around flapping wings and vortex interactions. Even with the advent of faster and better computer processors and improved numerical algorithms, computational fluid dynamics (CFD) techniques to accurately predict flow features around flapping wings lag behind. One of the driving forces for the study of insect flight is its applicability for micro-air vehicles (MAVs). Micro Air Vehicles (MAVs) have potential uses for surveillance, communication, hostage rescue missions, and sensor placement for chemical, biological, and nuclear materials. However, technical challenges such as small scale power generation, navigation, propulsion, and most importantly production of necessary aerodynamics forces have hindered the advancement of this technology and the routine use of MAVs. The most effective way to generate aerodynamic forces for such applications is by the use of flapping wings. Different components that are needed for the analysis and prediction of aerodynamic behavior of flapping wing flight are evaluated in this study. These components include: (a) library-based approach for adding overset capability to handle large relative motion between different objects. and (b) the use of a generalized mesh for handling complex geometries. Different interpolation methods for the transfer of information across different layers of generalized overset meshes are evaluated. The effect of primitive vs. conservative interpolation of flow variable is evaluated using a moving discontinuity across the overlapping region. Also, a preliminary study has been conducted to couple the developed flow simulation system with the FSI library developed at the University of Alabama at Birmingham. The focus of the research work is to explore various approaches for moving body problems and to investigate the developed computational system for its applicability and exploration for aerodynamic analysis of flapping wing flight.

Integrated Computational and Experimental Studies of Flapping-wing Micro Air Vehicle Aerodynamics

Author :
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (713 download)

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Book Synopsis Integrated Computational and Experimental Studies of Flapping-wing Micro Air Vehicle Aerodynamics by :

Download or read book Integrated Computational and Experimental Studies of Flapping-wing Micro Air Vehicle Aerodynamics written by and published by . This book was released on 2007 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes recent research on flapping-wing micro air vehicles, based on insect-like aerodynamics. A combined analytical, experimental and CFD approach is being adopted to understand and design suitable wing aerodynamics and kinematics. The CFD has used the Fluent 6 commercial code together with the grid-generating software Gambit 2; the experiments have been conducted in air and water, using various rigs and techniques. Part of our work has used 2D CFD and linear experiments (in a water tunnel). This has revealed details on vortex stability, the role of Kelvin-Helmholtz instability and Reynolds number effects. 3D CFD on rotating wings and equivalent experiments in a water tank have then been used to investigate the role of spanwise flow in the leading-edge vortex.

The DelFly

Author : G.C.H.E. de Croon
Publisher : Springer
ISBN 13 : 9401792089
Total Pages : 221 pages
Book Rating : 4.4/5 (17 download)

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Book Synopsis The DelFly by : G.C.H.E. de Croon

Download or read book The DelFly written by G.C.H.E. de Croon and published by Springer. This book was released on 2015-11-26 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the topics most relevant to autonomously flying flapping wing robots: flapping-wing design, aerodynamics, and artificial intelligence. Readers can explore these topics in the context of the "Delfly", a flapping wing robot designed at Delft University in The Netherlands. How are tiny fruit flies able to lift their weight, avoid obstacles and predators, and find food or shelter? The first step in emulating this is the creation of a micro flapping wing robot that flies by itself. The challenges are considerable: the design and aerodynamics of flapping wings are still active areas of scientific research, whilst artificial intelligence is subject to extreme limitations deriving from the few sensors and minimal processing onboard. This book conveys the essential insights that lie behind success such as the DelFly Micro and the DelFly Explorer. The DelFly Micro, with its 3.07 grams and 10 cm wing span, is still the smallest flapping wing MAV in the world carrying a camera, whilst the DelFly Explorer is the world's first flapping wing MAV that is able to fly completely autonomously in unknown environments. The DelFly project started in 2005 and ever since has served as inspiration, not only to many scientific flapping wing studies, but also the design of flapping wing toys. The combination of introductions to relevant fields, practical insights and scientific experiments from the DelFly project make this book a must-read for all flapping wing enthusiasts, be they students, researchers, or engineers.

Robotics Research

Author : Henrik I. Christensen
Publisher : Springer
ISBN 13 : 331929363X
Total Pages : 646 pages
Book Rating : 4.3/5 (192 download)

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Book Synopsis Robotics Research by : Henrik I. Christensen

Download or read book Robotics Research written by Henrik I. Christensen and published by Springer. This book was released on 2016-08-25 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents a collection of papers presented at the 15th International Symposium of Robotic Research (ISRR). ISRR is the biennial meeting of the International Foundation of Robotic Research (IFRR) and its 15th edition took place in Flagstaff, Arizona on December 9 to December 12, 2011. As for the previous symposia, ISRR 2011 followed up on the successful concept of a mixture of invited contributions and open submissions. Therefore approximately half of the 37 contributions were invited contributions from outstanding researchers selected by the IFRR officers and the program committee, and the other half were chosen among the open submissions after peer review. This selection process resulted in a truly excellent technical program which featured some of the very best of robotic research. The program was organized around oral presentation in a single-track format and included for the first time a small number of interactive presentations. The symposium contributions contained in this volume report on a variety of new robotics research results covering a broad spectrum including perception, manipulation, grasping, vehicles and design, navigation, control and integration, estimation and SLAM.

2023 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2023) Proceedings

Author : Song Fu
Publisher : Springer Nature
ISBN 13 : 9819739985
Total Pages : 1975 pages
Book Rating : 4.8/5 (197 download)

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Book Synopsis 2023 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2023) Proceedings by : Song Fu

Download or read book 2023 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2023) Proceedings written by Song Fu and published by Springer Nature. This book was released on with total page 1975 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Aerial Robots

Author : Omar D Lopez Mejia
Publisher : BoD – Books on Demand
ISBN 13 : 9535134639
Total Pages : 196 pages
Book Rating : 4.5/5 (351 download)

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Book Synopsis Aerial Robots by : Omar D Lopez Mejia

Download or read book Aerial Robots written by Omar D Lopez Mejia and published by BoD – Books on Demand. This book was released on 2017-09-06 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Few years ago, the topic of aerial robots was exclusively related to the robotics community, so a great number of books about the dynamics and control of aerial robots and UAVs have been written. As the control technology for UAVs advances, the great interaction that exists between other systems and elements that are as important as control such as aerodynamics, energy efficiency, acoustics, structural integrity, and applications, among others has become evident. Aerial Robots - Aerodynamics, Control, and Applications is an attempt to bring some of these topics related to UAVs together in just one book and to look at a selection of the most relevant problems of UAVs in a broader engineering perspective.

Supercomputing Frontiers

Author : Dhabaleswar K. Panda
Publisher : Springer Nature
ISBN 13 : 3031104196
Total Pages : 150 pages
Book Rating : 4.0/5 (311 download)

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Book Synopsis Supercomputing Frontiers by : Dhabaleswar K. Panda

Download or read book Supercomputing Frontiers written by Dhabaleswar K. Panda and published by Springer Nature. This book was released on 2022-06-30 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book constitutes the refereed proceedings of the 7th Asian Conference Supercomputing Conference, SCFA 2022, which took place in Singapore in March 2022. The 8 full papers presented in this book were carefully reviewed and selected from 21 submissions. They cover a range of topics including file systems, memory hierarchy, HPC cloud platform, container image configuration workflow, large-scale applications, and scheduling.

Application of Dynamic Mesh Method in CFD to Engineering Designs of Needle-Free Liquid Jet Injector and Diaphragm-less Shock Tube

Author : Haruka Nakayama
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis Application of Dynamic Mesh Method in CFD to Engineering Designs of Needle-Free Liquid Jet Injector and Diaphragm-less Shock Tube by : Haruka Nakayama

Download or read book Application of Dynamic Mesh Method in CFD to Engineering Designs of Needle-Free Liquid Jet Injector and Diaphragm-less Shock Tube written by Haruka Nakayama and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Frontiers in PDE-Constrained Optimization

Author : Harbir Antil
Publisher : Springer
ISBN 13 : 1493986368
Total Pages : 434 pages
Book Rating : 4.4/5 (939 download)

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Book Synopsis Frontiers in PDE-Constrained Optimization by : Harbir Antil

Download or read book Frontiers in PDE-Constrained Optimization written by Harbir Antil and published by Springer. This book was released on 2018-10-12 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a broad and uniform introduction of PDE-constrained optimization as well as to document a number of interesting and challenging applications. Many science and engineering applications necessitate the solution of optimization problems constrained by physical laws that are described by systems of partial differential equations (PDEs). As a result, PDE-constrained optimization problems arise in a variety of disciplines including geophysics, earth and climate science, material science, chemical and mechanical engineering, medical imaging and physics. This volume is divided into two parts. The first part provides a comprehensive treatment of PDE-constrained optimization including discussions of problems constrained by PDEs with uncertain inputs and problems constrained by variational inequalities. Special emphasis is placed on algorithm development and numerical computation. In addition, a comprehensive treatment of inverse problems arising in the oil and gas industry is provided. The second part of this volume focuses on the application of PDE-constrained optimization, including problems in optimal control, optimal design, and inverse problems, among other topics.