Hi, I am using gmsh generated meshes with periodic conditions, and this works in my case with MeshConvert. Have you tried using the paralign module, when using MeshConvert? Page 151 of the manual. Regards, Pozdrawiam, Stanisław Gepner On May 26, 2015 4:56:26 PM CEST, YU Jian <yuj@buaa.edu.cn> wrote: Dear All, I am trying to using the periodic condition within the CompressibleFlowSolver. I have tested the IsentropicVortex case with periodic conditions imposed at all boundaries. The xml file(attached with this mail) was generated with MeshConvert from a Gmesh file. I found out that in the <COMPOSITE> part, the listing order of the faces on a pair of periodic boundaries must be one-to-one correspondance, otherwise the boundary condition will not be applied correctly. However, MeshConvert seems not to be able to ensure the correct orders. For example, Wrong(generated directly by MeshConvert): <C ID="2"> F[14,4,31,23] </C> <C ID="3"> F[8,17,26,33] </C> <C ID="4"> F[1,7,20,25] </C> <C ID="5"> F[18,13,34,30] </C> <C ID="6"> F[0,6,11,16] </C> <C ID="7"> F[24,28,32,35] </C> Correct(modified manually): <C ID="2"> F[14,4,31,23] </C> <C ID="3"> F[17,8,33,26] </C> <C ID="4"> F[1,7,20,25] </C> <C ID="5"> F[13,18,30,34] </C> <C ID="6"> F[0,6,11,16] </C> <C ID="7"> F[24,28,32,35] </C> I further checked the MeshConvert , and found out that at line 339 of the file 'OutputNekpp.cpp', there is a comment "Ensure that this composite is not used for periodic BCs!". Does this mean that MeshConvert can not be used when periodic BCs exist? Thank you in advance! Best wishes, Jian YU <?xml version="1.0" encoding="utf-8" ?> <NEKTAR> <GEOMETRY DIM="3" SPACE="3"> <VERTEX> <V ID="0">0.00000000e+00 -5.00000000e+00 0.00000000e+00</V> <V ID="1">5.00000000e+00 -5.00000000e+00 0.00000000e+00</V> <V ID="2">5.00000000e+00 0.00000000e+00 0.00000000e+00</V> <V ID="3">0.00000000e+00 0.00000000e+00 0.00000000e+00</V> <V ID="4">0.00000000e+00 -5.00000000e+00 5.00000000e+00</V> <V ID="5">5.00000000e+00 -5.00000000e+00 5.00000000e+00</V> <V ID="6">5.00000000e+00 0.00000000e+00 5.00000000e+00</V> <V ID="7">0.00000000e+00 0.00000000e+00 5.00000000e+00</V> <V ID="8">1.00000000e+01 -5.00000000e+00 0.00000000e+00</V> <V ID="9">1.00000000e+01 0.00000000e+00 0.00000000e+00</V> <V ID="10">1.00000000e+01 -5.00000000e+00 5.00000000e+00</V> <V ID="11">1.00000000e+01 0.00000000e+00 5.00000000e+00</V> <V ID="12">5.00000000e+00 5.00000000e+00 0.00000000e+00</V> <V ID="13">0.00000000e+00 5.00000000e+00 0.00000000e+00</V> <V ID="14">5.00000000e+00 5.00000000e+00 5.00000000e+00</V> <V ID="15">0.00000000e+00 5.00000000e+00 5.00000000e+00</V> <V ID="16">1.00000000e+01 5.00000000e+00 0.00000000e+00</V> <V ID="17">1.00000000e+01 5.00000000e+00 5.00000000e+00</V> <V ID="18">0.00000000e+00 -5.00000000e+00 1.00000000e+01</V> <V ID="19">5.00000000e+00 -5.00000000e+00 1.00000000e+01</V> <V ID="20">5.00000000e+00 0.00000000e+00 1.00000000e+01</V> <V ID="21">0.00000000e+00 0.00000000e+00 1.00000000e+01</V> <V ID="22">1.00000000e+01 -5.00000000e+00 1.00000000e+01</V> <V ID="23">1.00000000e+01 0.00000000e+00 1.00000000e+01</V> <V ID="24">5.00000000e+00 5.00000000e+00 1.00000000e+01</V> <V ID="25">0.00000000e+00 5.00000000e+00 1.00000000e+01</V> <V ID="26">1.00000000e+01 5.00000000e+00 1.00000000e+01</V> </VERTEX> <EDGE> <E ID="0"> 0 1 </E> <E ID="1"> 1 2 </E> <E ID="2"> 2 3 </E> <E ID="3"> 3 0 </E> <E ID="4"> 0 4 </E> <E ID="5"> 1 5 </E> <E ID="6"> 2 6 </E> <E ID="7"> 3 7 </E> <E ID="8"> 4 5 </E> <E ID="9"> 5 6 </E> <E ID="10"> 6 7 </E> <E ID="11"> 7 4 </E> <E ID="12"> 1 8 </E> <E ID="13"> 8 9 </E> <E ID="14"> 9 2 </E> <E ID="15"> 8 10 </E> <E ID="16"> 9 11 </E> <E ID="17"> 5 10 </E> <E ID="18"> 10 11 </E> <E ID="19"> 11 6 </E> <E ID="20"> 2 12 </E> <E ID="21"> 12 13 </E> <E ID="22"> 13 3 </E> <E ID="23"> 12 14 </E> <E ID="24"> 13 15 </E> <E ID="25"> 6 14 </E> <E ID="26"> 14 15 </E> <E ID="27"> 15 7 </E> <E ID="28"> 9 16 </E> <E ID="29"> 16 12 </E> <E ID="30"> 16 17 </E> <E ID="31"> 11 17 </E> <E ID="32"> 17 14 </E> <E ID="33"> 4 18 </E> <E ID="34"> 5 19 </E> <E ID="35"> 6 20 </E> <E ID="36"> 7 21 </E> <E ID="37"> 18 19 </E> <E ID="38"> 19 20 </E> <E ID="39"> 20 21 </E> <E ID="40"> 21 18 </E> <E ID="41"> 10 22 </E> <E ID="42"> 11 23 </E> <E ID="43"> 19 22 </E> <E ID="44"> 22 23 </E> <E ID="45"> 23 20 </E> <E ID="46"> 14 24 </E> <E ID="47"> 15 25 </E> <E ID="48"> 20 24 </E> <E ID="49"> 24 25 </E> <E ID="50"> 25 21 </E> <E ID="51"> 17 26 </E> <E ID="52"> 23 26 </E> <E ID="53"> 26 24 </E> </EDGE> <FACE> <Q ID="0"> 0 1 2 3</Q> <Q ID="1"> 0 5 8 4</Q> <Q ID="2"> 1 6 9 5</Q> <Q ID="3"> 2 6 10 7</Q> <Q ID="4"> 3 7 11 4</Q> <Q ID="5"> 8 9 10 11</Q> <Q ID="6"> 12 13 14 1</Q> <Q ID="7"> 12 15 17 5</Q> <Q ID="8"> 13 16 18 15</Q> <Q ID="9"> 14 16 19 6</Q> <Q ID="10"> 17 18 19 9</Q> <Q ID="11"> 2 20 21 22</Q> <Q ID="12"> 20 23 25 6</Q> <Q ID="13"> 21 23 26 24</Q> <Q ID="14"> 22 24 27 7</Q> <Q ID="15"> 10 25 26 27</Q> <Q ID="16"> 14 28 29 20</Q> <Q ID="17"> 28 30 31 16</Q> <Q ID="18"> 29 30 32 23</Q> <Q ID="19"> 19 31 32 25</Q> <Q ID="20"> 8 34 37 33</Q> <Q ID="21"> 9 35 38 34</Q> <Q ID="22"> 10 35 39 36</Q> <Q ID="23"> 11 36 40 33</Q> <Q ID="24"> 37 38 39 40</Q> <Q ID="25"> 17 41 43 34</Q> <Q ID="26"> 18 42 44 41</Q> <Q ID="27"> 19 42 45 35</Q> <Q ID="28"> 43 44 45 38</Q> <Q ID="29"> 25 46 48 35</Q> <Q ID="30"> 26 46 49 47</Q> <Q ID="31"> 27 47 50 36</Q> <Q ID="32"> 39 48 49 50</Q> <Q ID="33"> 31 51 52 42</Q> <Q ID="34"> 32 51 53 46</Q> <Q ID="35"> 45 52 53 48</Q> </FACE> <ELEMENT> <H ID="0"> 0 1 2 3 4 5 </H> <H ID="1"> 6 7 8 9 2 10 </H> <H ID="2"> 11 3 12 13 14 15 </H> <H ID="3"> 16 9 17 18 12 19 </H> <H ID="4"> 5 20 21 22 23 24 </H> <H ID="5"> 10 25 26 27 21 28 </H> <H ID="6"> 15 22 29 30 31 32 </H> <H ID="7"> 19 27 33 34 29 35 </H> </ELEMENT> <COMPOSITE> <C ID="1"> H[0-7] </C> <C ID="2"> F[14,4,31,23] </C> <C ID="3"> F[8,17,26,33] </C> <C ID="4"> F[1,7,20,25] </C> <C ID="5"> F[18,13,34,30] </C> <C ID="6"> F[0,6,11,16] </C> <C ID="7"> F[24,28,32,35] </C> </COMPOSITE> <DOMAIN> C[1] </DOMAIN> </GEOMETRY> <EXPANSIONS> <E COMPOSITE="C[1]" NUMMODES="15" FIELDS="rho,rhou,rhov,rhow,E" TYPE="MODIFIED" /> </EXPANSIONS> <CONDITIONS> <PARAMETERS> <P> FinTime = 10. </P> <P> TimeStep = 0.002 </P> <P> NumSteps = 0 </P> <P> IO_CheckSteps = 500 </P> <P> IO_InfoSteps = 1 </P> <P> Gamma = 1.4 </P> <P> pInf = 101325 </P> <P> rhoInf = 1.225 </P> <P> uInf = 0.1 </P> <P> vInf = 0.0 </P> <P> wInf = 0.0 </P> <P> CFL = 0 </P> </PARAMETERS> <SOLVERINFO> <I PROPERTY="EQType" VALUE="EulerCFE" /> <I PROPERTY="Projection" VALUE="DisContinuous" /> <I PROPERTY="AdvectionType" VALUE="WeakDG" /> <I PROPERTY="TimeIntegrationMethod" VALUE="ClassicalRungeKutta4"/> <I PROPERTY="UpwindType" VALUE="ExactToro" /> <I PROPERTY="ProblemType" VALUE="IsentropicVortex" /> </SOLVERINFO> <VARIABLES> <V ID="0"> rho </V> <V ID="1"> rhou </V> <V ID="2"> rhov </V> <V ID="3"> rhow </V> <V ID="4"> E </V> </VARIABLES> <BOUNDARYREGIONS> <B ID="1"> C[2] </B> <B ID="2"> C[3] </B> <B ID="3"> C[4] </B> <B ID="4"> C[5] </B> <B ID="5"> C[6] </B> <B ID="6"> C[7] </B> </BOUNDARYREGIONS> <BOUNDARYCONDITIONS> <REGION REF="1"> <P VAR="rho" VALUE=[2]/> <P VAR="rhou" VALUE=[2]/> <P VAR="rhov" VALUE=[2]/> <P VAR="rhow" VALUE=[2]/> <P VAR="E" VALUE=[2]/> </REGION> <REGION REF="2"> <P VAR="rho" VALUE=[1]/> <P VAR="rhou" VALUE=[1]/> <P VAR="rhov" VALUE=[1]/> <P VAR="rhow" VALUE=[1]/> <P VAR="E" VALUE=[1]/> </REGION> <REGION REF="3"> <P VAR="rho" VALUE=[4]/> <P VAR="rhou" VALUE=[4]/> <P VAR="rhov" VALUE=[4]/> <P VAR="rhow" VALUE=[4]/> <P VAR="E" VALUE=[4]/> </REGION> <REGION REF="4"> <P VAR="rho" VALUE=[3]/> <P VAR="rhou" VALUE=[3]/> <P VAR="rhov" VALUE=[3]/> <P VAR="rhow" VALUE=[3]/> <P VAR="E" VALUE=[3]/> </REGION> <REGION REF="5"> <P VAR="rho" VALUE=[6]/> <P VAR="rhou" VALUE=[6]/> <P VAR="rhov" VALUE=[6]/> <P VAR="rhow" VALUE=[6]/> <P VAR="E" VALUE=[6]/> </REGION> <REGION REF="6"> <P VAR="rho" VALUE=[5]/> <P VAR="rhou" VALUE=[5]/> <P VAR="rhov" VALUE=[5]/> <P VAR="rhow" VALUE=[5]/> <P VAR="E" VALUE=[5]/> </REGION> </BOUNDARYCONDITIONS> <!-- Initial conditions not necessary since they are imposed analitically --> <!--FUNCTION NAME="InitialConditions"> <E VAR="rho" VALUE="1"/> <E VAR="rhou" VALUE="1"/> <E VAR="rhov" VALUE="1"/> <E VAR="E" VALUE="1"/> </FUNCTION--> </CONDITIONS> </NEKTAR> ------------------------------------------------------------------------ Nektar-users mailing list Nektar-users@imperial.ac.uk https://mailman.ic.ac.uk/mailman/listinfo/nektar-users