54 lines
2.9 KiB
HTML
54 lines
2.9 KiB
HTML
<HTML>
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<CENTER><A HREF = "http://www.cfdem.com">CFDEMproject WWW Site</A> - <A HREF = "CFDEMcoupling_Manual.html#comm">CFDEM Commands</A>
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<H3>cfdemSolverIB command
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</H3>
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<P><B>Description:</B>
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</P>
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<P>"cfdemSolverIB" is a coupled CFD-DEM solver using CFDEMcoupling, an open source parallel coupled CFD-DEM framework, for calculating
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the dynamics between immersed bodies and the surrounding fluid. Being an implementation of an immersed boundary method it allows tackling problems where the body diameter exceeds the maximal size of a fluid cell. Using the toolbox of OpenFOAM(R)(*) the governing equations of the fluid are computed and the corrections of velocity and pressure field with respect to the body-movement information, gained from LIGGGHTS, are incorporated.
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</P>
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<P>Code of this solver contributions by Alice Hager, JKU.
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</P>
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<P><B>Algorithm:</B>
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</P>
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<P>For each time step ...
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</P>
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<UL><LI>the motion of the spheres is calculated (position, velocity, angular velocity, force...) with LIGGGHTS using the velocity and pressure-field from the previous time step (initial condition for t=0).
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<LI>the Navier-Stokes equations are solved on the whole computational domain, disregarding the solid phase.
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<LI>the spheres are located within the mesh: each sphere is represented by a cluster of cells, which are either totally or partially covered by the body, depending on its exact position.
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<LI>the correction of the velocity and pressure field of the fluid phase takes place, using the information about the location of the spheres and their (angular) velocity.
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</UL>
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<P><B>Use:</B>
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<P>The solver is realized within the Open Source framework CFDEMcoupling. Just as for the unresolved CFD-DEM solver cfdemSolverPiso the file CFD/constant/couplingProperties contains information about the settings for the different models. While IOmodel, DataExchangeModel etc. are applicable for all CFDEMcoupling-solvers, special locate-, force- and void fraction models were designed for the present case:
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</P>
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<P><A HREF = "locateModel_engineSearchIB.html">engineSearchIB</A>, <A HREF = "forceModel_ArchimedesIB.html">ArchimedesIB</A>, <A HREF = "forceModel_ShirgaonkarIB.html">ShirgaonkarIB</A>, <A HREF = "voidFractionModel_IBVoidFraction.html">IBVoidfraction</A>
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</P>
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<P><B>References:</B>
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<P>GONIVA, C., KLOSS, C., HAGER,A., WIERINK, G. and PIRKER, S. (2011): "A MULTI-PURPOSE OPEN SOURCE CFD-DEM APPROACH", Proc. of the 8th Int. Conf. on CFD in Oil and Gas, Metallurgical and Process Industries, Trondheim, Norway
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</P>
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<P>and
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<P>HAGER, A., KLOSS, C. and GONIVA, C. (2011): "TOWARDS AN EFFICIENT IMMERSED BOUNDARY METHOD WITHIN AN OPEN SOURCE FRAMEWORK", Proc. of the 8th Int. Conf. on CFD in Oil and Gas, Metallurgical and Process Industries, Trondheim, Norway
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</P>
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<HR>
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<P>(*) This offering is not approved or endorsed by OpenCFD Limited, the producer of the OpenFOAM software and owner of the OPENFOAM® and OpenCFD® trade marks.
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</P>
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