Wind Field Simulation in a Wind Farm Using Openfoam and Actuator Line Model
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Advanced Molecular Dynamics in Openfoam✩ S.M
Computer Physics Communications 224 (2018) 1–21 Contents lists available at ScienceDirect Computer Physics Communications journal homepage: www.elsevier.com/locate/cpc Feature article mdFoam+: Advanced molecular dynamics in OpenFOAMI S.M. Longshaw a,*, M.K. Borg b, S.B. Ramisetti b, J. Zhang b, D.A. Lockerby c, D.R. Emerson a, J.M. Reese b a Scientific Computing Department, The Science & Technology Facilities Council, Daresbury Laboratory, Warrington, Cheshire WA4 4AD, UK b School of Engineering, University of Edinburgh, Edinburgh EH9 3FB, UK c School of Engineering, University of Warwick, Coventry, CV4 7AL, UK article info a b s t r a c t Article history: This paper introduces mdFoam+, which is an MPI parallelised molecular dynamics (MD) solver imple- Received 6 March 2017 mented entirely within the OpenFOAM software framework. It is open-source and released under the Received in revised form 17 August 2017 same GNU General Public License (GPL) as OpenFOAM. The source code is released as a publicly open Accepted 25 September 2017 software repository that includes detailed documentation and tutorial cases. Since mdFoam+ is designed Available online 23 October 2017 entirely within the OpenFOAM C++ object-oriented framework, it inherits a number of key features. The Keywords: code is designed for extensibility and flexibility, so it is aimed first and foremost as an MD research tool, OpenFOAM in which new models and test cases can be developed and tested rapidly. Implementing mdFoam+ in Molecular dynamics OpenFOAM also enables easier development of hybrid methods that couple MD with continuum-based MD solvers. Setting up MD cases follows the standard OpenFOAM format, as mdFoam+ also relies upon Computational fluid dynamics the OpenFOAM dictionary-based directory structure. -
Introduction to Nuclear Reactor Modelling Using Openfoam Carlo Fiorina 2
Introduction to nuclear reactor modelling using OpenFOAM Carlo Fiorina 2 Disclaimer C. Fiorina ▪ Focus on the use of OpenFOAM for multiphysics ○ Use of OpenFOAM as CFD tool widely covered by documentation, forums, courses, etc. ▪ Focus on already existing tool (GeN-Foam) as an example ○ Programming from scratch is not that difficult, but unsuited for a 75 minutes lecture ▪ In the slides, more material than can actually be covered in this lecture ○ Can help better understanding the slides after the lecture 3 Content C. Fiorina ▪ General Introduction ▪ Introduction to the use of OpenFOAM ▪ Basics of GeN-Foam ▪ Short introduction on the use of GeN-Foam 4 Objective C. Fiorina What is it about? ▪ Provide you with general information, references, suggestions, terminology and lessons learnt that can facilitate your approach to the OpenFOAM world ▪ Provide with slides that can help you out orienting yourself if you decide to embrace the use of OpenFOAM What is not about? ▪ Detailed course on the use of OpenFOAM ▪ Hands-on training 5 The IAEA-facilitated ONCORE initiative C. Fiorina ONCORE to support the open-source nuclear community and help addressing typical shortcomings of open-source development (scattered community, documentation, QA, loss of knowledge) ▪ Promote collaboration and facilitate communication (connect the community) ▪ Provide guidelines for code contribution (documentation, QA) ▪ Provide development best practices (QA) ▪ Preserve knowledge ○ Incl. compiling a list of open-source codes https://www.iaea.org/topics/nuclear-power-reactors/open-source-nuclear-cod e-for-reactor-analysis-oncore 6 A first important outcome: list of C. Fiorina available codes ▪ https://nucleus.iaea.org/sites/oncore/SitePages/List%20of%20Codes.aspx ▪ A vibrant community with an impressive R&D output ▪ ~35 codes already identified so far: ○ OpenMC ○ Raven ○ Dragon ○ MOOSE ○ Salome platform (Code_Saturne, Code_Aster) ○ TrioCFD ○ … ○ Several OpenFOAM-based tools 7 A central tool for open-source simulation C. -
Implementation and Validation of an Advanced Wind Energy Controller in Aero-Servo-Elastic Simulations Using the Lifting Line Free Vortex Wake Model
energies Article Implementation and Validation of an Advanced Wind Energy Controller in Aero-Servo-Elastic Simulations Using the Lifting Line Free Vortex Wake Model Sebastian Perez-Becker *, David Marten, Christian Navid Nayeri and Christian Oliver Paschereit Chair of Fluid Dynamics, Hermann Föttinger Institute, Technische Universität Berlin, Müller-Breslau-Str. 8, 10623 Berlin, Germany; [email protected] (D.M.); [email protected] (C.N.N.); [email protected] (C.O.P.) * Correspondence: [email protected] Abstract: Accurate and reproducible aeroelastic load calculations are indispensable for designing modern multi-MW wind turbines. They are also essential for assessing the load reduction capabilities of advanced wind turbine control strategies. In this paper, we contribute to this topic by introducing the TUB Controller, an advanced open-source wind turbine controller capable of performing full load calculations. It is compatible with the aeroelastic software QBlade, which features a lifting line free vortex wake aerodynamic model. The paper describes in detail the controller and includes a validation study against an established open-source controller from the literature. Both controllers show comparable performance with our chosen metrics. Furthermore, we analyze the advanced load reduction capabilities of the individual pitch control strategy included in the TUB Controller. Turbulent wind simulations with the DTU 10 MW Reference Wind Turbine featuring the individual pitch control strategy show a decrease in the out-of-plane and torsional blade root bending moment fatigue loads of 14% and 9.4% respectively compared to a baseline controller. Citation: Perez-Becker, S.; Marten, D.; Nayeri, C.N.; Paschereit, C.O. -
15Th Openfoam Workshop - June 22, 2020 - Technical Session I-D a Flexible and Precice Solver Coupling Ecosystem
15th OpenFOAM Workshop - June 22, 2020 - Technical Session I-D A flexible and preCICE solver coupling ecosystem Gerasimos Chourdakis, Technical University of Munich [email protected] Benjamin Uekermann, Eindhoven University of Technology [email protected] Find these slides on GitHub https://github.com/MakisH/ofw15-slides The Big Picture e r ic r te c e p e lv a r o d p s a lib structure fluid solver solver The Big Picture e r ic r te c e p e lv a r o d p s a lib structure fluid solver solver in-house commercial solver solver The Big Picture e r ic r te c e p e lv a r o d p s a lib structure fluid solver solver OpenFOAM CalculiX SU2 Code_Aster foam-extend FEniCS deal-ii Nutils MBDyn in-house commercial solver solver API in: C++ Python Matlab ANSYS Fluent C Fortran COMSOL The Big Picture e r ic r te c e p e lv a r o d p s a lib structure fluid solver A Coupling Library for Partitioned Multi-Physics Simulations solver OpenFOAM CalculiX SU2 Code_Aster . foam-extend FEniCS deal-ii . Nutils MBDyn communication data mapping in-house commercial solver solver coupling schemes time interpolation API in: C++ Python Matlab ANSYS Fluent C Fortran COMSOL News preCICE v2.0 Simplified config & API Better building & testing XML reference & visualizer xSDK member Faster initialization Better Python bindings Spack / Debian / AUR New Matlab bindings packages Upgrade guide in the wiki Other news deal.ii adapter new non-linear example for FSI FEniCS adapter new example for FSI code_aster adapter revived for code_aster 14 and preCICE v2 The OpenFOAM adapter -
Investigation of Different Airfoils on Outer Sections of Large Rotor Blades
School of Innovation, Design and Engineering Bachelor Thesis in Aeronautical Engineering 15 credits, Basic level 300 Investigation of Different Airfoils on Outer Sections of Large Rotor Blades Authors: Torstein Hiorth Soland and Sebastian Thuné Report code: MDH.IDT.FLYG.0254.2012.GN300.15HP.Ae Sammanfattning Vindkraft står för ca 3 % av jordens produktion av elektricitet. I jakten på grönare kraft, så ligger mycket av uppmärksamheten på att få mer elektricitet från vindens kinetiska energi med hjälp av vindturbiner. Vindturbiner har använts för elektricitetsproduktion sedan 1887 och sedan dess så har turbinerna blivit signifikant större och med högre verkningsgrad. Driftsförhållandena förändras avsevärt över en rotors längd. Inre delen är oftast utsatt för mer komplexa driftsförhållanden än den yttre delen. Den yttre delen har emellertid mycket större inverkan på kraft och lastalstring. Här är efterfrågan på god aerodynamisk prestanda mycket stor. Vingprofiler för mitten/yttersektionen har undersökts för att passa till en 7.0 MW rotor med diametern 165 meter. Kriterier för bladprestanda ställdes upp och sensitivitetsanalys gjordes. Med hjälp av programmen XFLR5 (XFoil) och Qblade så sattes ett blad ihop av varierande vingprofiler som sedan testades med bladelement momentum teorin. Huvuduppgiften var att göra en simulering av rotorn med en aero-elastisk kod som gav information beträffande driftsbelastningar på rotorbladet för olika vingprofiler. Dessa resultat validerades i ett professionellt program för aeroelasticitet (Flex5) som simulerar steady state, turbulent och wind shear. De bästa vingprofilerna från denna rapportens profilkatalog är NACA 63-6XX och NACA 64-6XX. Genom att implementera dessa vingprofiler på blad design 2 och 3 så erhölls en mycket hög prestanda jämfört med stora kommersiella HAWT rotorer. -
Model Order Reduction for Aerodynamic Lifting Surfaces Aerospace Engineering
Model Order Reduction for Aerodynamic Lifting Surfaces Gonçalo da Cunha Laboreiro Mendonça Thesis to obtain the Master of Science Degree in Aerospace Engineering Supervisors: Prof. Fernando José Parracho Lau Dr. Frederico José Prata Rente Reis Afonso Examination Committee Chairperson: Prof. Filipe Szolnoky Ramos Pinto Cunha Supervisor: Prof. Fernando José Parracho Lau Member of the Committee: Prof. Afzal Suleman November 2017 ii Dedicated to my family and friends, who were always there for me. iii iv Acknowledgments I would like to thank dearly my supervisors Prof. Lau and Dr. Afonso who gave me constant support throughout this thesis up until the very end. Their insights on aerodynamics and CFD models guided me in my research of model order reduction methods and allowed me to better understand the models with which I had to work. Their demands for rigor and quality also pushed me to better my work, and in the end write a better thesis. v vi Resumo Nesta tese o tema de reduc¸ao˜ de modelos e a sua aplicac¸ao˜ a Mecanicaˆ de Fluidos Computacional sao˜ abordados. E´ mostrada a necessidade da industria´ aeroespacial, seja nacional ou Europeia, de modelos mais rapidos´ mas fieis´ a` realidade. Isto e´ devido ao elevado tempo de calculo´ associado aos modelos de alta-fidelidade. Estes mostram-se pouco viaveis´ para aplicac¸oes˜ do tipo Optimizac¸ao˜ Multi- disciplinar, como a plataforma de optimizac¸ao˜ NOVEMOR. Tendo por objectivo testar e aplicar reduc¸ao˜ de modelos a modelos CFD de superf´ıcies sustentadoras, uma pesquisa bibliografica´ abrangendo a reduc¸ao˜ de modelos nao-lineares,˜ dinamicosˆ e ou estaticos´ foi feita. -
The One-Way FSI Method Based on RANS-FEM for the Open Water Test of a Marine Propeller at the Different Loading Conditions
Journal of Marine Science and Engineering Article The One-Way FSI Method Based on RANS-FEM for the Open Water Test of a Marine Propeller at the Different Loading Conditions Mobin Masoomi 1 and Amir Mosavi 2,3,* 1 Department of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran; [email protected] 2 Faculty of Civil Engineering, Technische Universität Dresden, 01069 Dresden, Germany 3 John von Neumann Faculty of Informatics, Obuda University, 1034 Budapest, Hungary * Correspondence: [email protected] Abstract: This paper aims to assess a new fluid–structure interaction (FSI) coupling approach for the vp1304 propeller to predict pressure and stress distributions with a low-cost and high-precision approach with the ability of repeatability for the number of different structural sets involved, other materials, or layup methods. An outline of the present coupling approach is based on an open- access software (OpenFOAM) as a fluid solver, and Abaqus used to evaluate and predict the blade’s deformation and strength in dry condition mode, which means the added mass effects due to propeller blades vibration is neglected. Wherein the imposed pressures on the blade surfaces are extracted for all time-steps. Then, these pressures are transferred to the structural solver as a load condition. Although this coupling approach was verified formerly (wedge impact), for the case in-hand, a further verification case, open water test, was performed to evaluate the hydrodynamic part of the solution with an e = 7.5% average error. A key factor for the current coupling approach is Citation: Masoomi, M.; Mosavi, A. -
Design and Simulation of Small Wind Turbine Blades in Q-Blade
© 2017 IJEDR | Volume 5, Issue 4 | ISSN: 2321-9939 Design and Simulation of Small Wind Turbine Blades in Q-Blade 1Veeksha Rao Ponakala, 2Dr G Anil Kumar 1PG Student, 2Assistant Professor School of Renewable Energy and Environment, Institute of Science and Technology, JNTUK, Kakinada, India Abstract- Electrical energy demand has been continuously increasing. Power generation using wind turbines is becoming viable solution as there is demand for cleaner energy sources. Wind power generators are usually located away from human dwellings for higher power generation. In any other case, turbines placed at lower altitudes, are subjected to low wind speeds and non optimal wind flow conditions. Vertical axis wind turbines (VAWTs) are more efficient than the horizontal axis wind turbines (HAWTs) for low wind speed applications because of their ability to capture wind flowing from any direction. Therefore, VAWT systems are more suitable for residential and urban applications as they are universally adaptable. Major limitation observed in VAWT is high drag and turbulent force produced by the blade. This paper presents the VAWT rotor blade design to overcome the limitations. By considering the parameters required for design of blade geometry, National Advisory Committee of Aeronautics (NACA) series 0016- 64 can be utilised for optimum aerodynamic performance. NACA 0018 airfoil is selected and analysed within the required range of Reynolds numbers and wind speeds in Q-Blade software. With the proper airfoil design optimal for low wind speed conditions, the turbine efficiency can be increased in addition to maximisation of the power produced. Index Terms- VAWT, Rotor Blades, Airfoil, Lift Force, Drag Force, Q-Blade. -
Qblade Guidelines V0.6
QBlade Guidelines v0.6 David Marten Juliane Wendler January 18, 2013 Contact: david.marten(at)tu-berlin.de Contents 1 Introduction 5 1.1 Blade design and simulation in the wind turbine industry . 5 1.2 The software project . 7 2 Software implementation 9 2.1 Code limitations . 9 2.2 Code structure . 9 2.3 Plotting results / Graph controls . 11 3 TUTORIAL: How to create simulations in QBlade 13 4 XFOIL and XFLR/QFLR 29 5 The QBlade 360◦ extrapolation module 30 5.0.1 Basics . 30 5.0.2 Montgomery extrapolation . 31 5.0.3 Viterna-Corrigan post stall model . 32 6 The QBlade HAWT module 33 6.1 Basics . 33 6.1.1 The Blade Element Momentum Method . 33 6.1.2 Iteration procedure . 33 6.2 The blade design and optimization submodule . 34 6.2.1 Blade optimization . 36 6.2.2 Blade scaling . 37 6.2.3 Advanced design . 38 6.3 The rotor simulation submodule . 39 6.4 The multi parameter simulation submodule . 40 6.5 The turbine definition and simulation submodule . 41 6.6 Simulation settings . 43 6.6.1 Simulation Parameters . 43 6.6.2 Corrections . 47 6.7 Simulation results . 52 6.7.1 Data storage and visualization . 52 6.7.2 Variable listings . 53 3 Contents 7 The QBlade VAWT Module 56 7.1 Basics . 56 7.1.1 Method of operation . 56 7.1.2 The Double-Multiple Streamtube Model . 57 7.1.3 Velocities . 59 7.1.4 Iteration procedure . 59 7.1.5 Limitations . 60 7.2 The blade design and optimization submodule . -
EOF-Library: Open-Source Elmer FEM and Openfoam Coupler For
EOF-Library: Open-source Elmer FEM and OpenFOAM coupler for electromagnetics and fluid dynamics (CC BY-SA 4.0) Motivation for MHD - controlling liquid metals Liquid metal pump rotating permanent pipe magnets F1 F2 F FL FL Mechanically FL FL Electromagnetically Required physics Modelling coupled ● Electromagnetics ● Fluid dynamics Extra ● Free surface ● Heat transfer Liquid metal pump - modelling requires two-way ● Solidification / melting coupled electromagnetics and fluid dynamics 1 Required numerical models Fluid dynamics ● 3D, transient Electromagnetics ● High Reynolds ● Complex geometries, turbulence models multi-regions ● Complex A−V ● Volume of Fluid magnetic vector ● Advanced pre- and potential (VOF) for free post-processing tools surface modelling formulation ● Parallelization with ● Conductivity ● Viscosity good scaling dependence on dependence on temperature ● User community, temperature documentation 2 Existing Open Source codes Best for Best for Electromagnetics (EM) Fluid dynamics (FD) FEM FVM getDP OpenFOAM Elmer SU2 ... ... 3 Choosing Electromagnetics solver (1) GetDP + Designed for EM in mind, great for eddy-current problems + Uses PETSc iterative solvers, PETSc is MPI parallelized - Matrix assembly is not parallel (neither MPI nor OpenMP) - Weak integration with external post-processing tools MaxFEM, FreeFem++, deal.II, … Pictures from getdp.info ● I have no opinion 4 Choosing Electromagnetics solver (2) Elmer by CSC (Finland) + Multiphysics out-of-the-box (>40 solvers) + Build-in linear & nonlinear iterative solvers, -
Performance Analysis of a Small Capacity Horizontal Axis Wind Turbine Using Qblade
International Journal of Recent Technology and Engineering (IJRTE) ISSN: 2277-3878, Volume-7, Issue-6S, March 2019 Performance Analysis of a Small Capacity Horizontal Axis Wind Turbine using QBlade Ali Said, Mazharul Islam, Mohiuddin A.K.M, Moumen Idres Abstract--- In recent times, wind energy has become one of the In this article, selected prospective airfoils have been leading renewable energy sources for generating electricity in identified and analyzed with the help of Qblade software. prospective regions around the globe. Nowadays, researchers are Results for a 3kW HAWT have also been validated with conducting different research activities to develop and optimize existing experimental results from Anderson et al [3]. The the existing designs of wind turbines through experimental and diversified computational techniques. Among the computational current research outcomes are expected to help the techniques, one of the popular choices is Computational Fluid prospective researchers to design optimized smaller-capacity Dynamics (CFD). However, CFD techniques are hardware HAWT for different prospective locations. intensive and computationally expensive. On the other hand, freely available simple tools like QBlade is computationally inexpensive and it can be used for performance and design analyses of horizontal and vertical axis wind turbines. In the present research, an attempt has been made to use QBlade for performance analyses of a smaller capacity horizontal axis wind turbine using selected prospective airfoils. In this study, four airfoils (namely, NACA 4412, SG6043, SD7062 and S833) have been selected and investigated in QBlade. It has been found that the overall power coefficients (CP) of NACA 4412 at different tip speed ratios are superior to the other three airfoils. -
Book of Abstracts
Book of abstracts 9th PhD Seminar on Wind Energy in Europe September 18-20, 2013 Uppsala University Campus Gotland, Sweden Campus Gotland WIND ENERGY Book of abstracts of 9th PhD Seminar on Wind Energy in Europe Uppsala University Campus Gotland, Sweden Campus Gotland, Wind Energy 621 67 Visby PREFACE The wind energy field is becoming more and more important in relation with future challenges of switching the world energy system to renewables. Therefore it is of high importance that tomorrow’s researchers in the field from all over the word meet and discuss future challenges. The 9th annual EAWE PhD seminar is in 2013 organized by Uppsala University Campus Gotland. This is a very suitable place for this event since it combines a unique historical environment with a sustainable profile and a long tradition of wind energy. Today about 45% of the energy consumption is locally produced by wind energy. Uppsala University Campus Gotland also has more than 10 years experience of teaching and research in the field with a focus on wind power project development. The aim with this seminar is to improve the international communication and information sharing of ongoing activities as well as simplify contact building between young researchers. It is also a perfect opportunity for PhD students to practice and improve their presentation and discussion skills. Associate Professor Stefan Ivanell Director, Wind Energy Uppsala University, Campus Gotland Book of abstracts of 9th PhD Seminar on Wind Energy in Europe September 18-20, 2013, Uppsala University Campus Gotland, Sweden TABLE OF CONTENTS ROTOR & WAKE AERODYNAMICS UNDERSTANDING THE WIND TURBINE BREAKDOWN MECHANISM WITH CFD M.