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[Sponsors] |
July 14, 2005, 07:36 |
who know the software NaSt3DGP
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#1 |
Guest
Posts: n/a
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i meet some problem when i study this software,if someonge if familiar with it ,may i make a communicatin with you !
regards. thank you very much |
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July 14, 2005, 13:37 |
Re: who know the software NaSt3DGP
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#2 |
Guest
Posts: n/a
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I am using that software from time to time. What is your question?
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July 15, 2005, 05:40 |
Re: who know the software NaSt3DGP
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#3 |
Guest
Posts: n/a
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i have give you a email . thank you very much for your feedback!
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July 21, 2005, 07:38 |
Re: who know the software NaSt3DGP
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#4 |
Guest
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how can we perform a steady computation with the NaSt3DGP
thank you for your feedback |
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July 21, 2005, 12:04 |
Re: who know the software NaSt3DGP
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#5 |
Guest
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You run a long time evolution until the solution doesn't evolve. Then you will get a steady computation if it has a steady solution.
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July 22, 2005, 01:59 |
Re: who know the software NaSt3DGP
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#6 |
Guest
Posts: n/a
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thank you very much !
but i saw the time step changed automatically ,how can i set a time step that doennot change . regards |
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July 22, 2005, 02:15 |
Re: who know the software NaSt3DGP
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#7 |
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check the file named as navcalc.cxx in the src direction.
//####################### //## Time-Step Control ## //####################### NS_REAL NavierCalc::TimeStep() { int i,j,k,l,oldtimer=timer->Start(6,Par) ; NS_REAL deltneu=S.deltmax ; static NS_REAL xmin=1e15,ymin=1e15,zmin=1e15 ; if (xmin==1e15 && ymin==1e15 && zmin==1e15) { PIJKLOOP {xmin=min(xmin,DX[i]); ymin=min(ymin,DY[j]); zmin=min(zmin,DZ[k]);} } // local CFL-condition including volume forces PIJKLOOP { deltneu=min(deltneu, S.tfconv*2/(fabs(U[i][j][k])/DXM[i]+ sqrt( (U[i][j][k]*U[i][j][k])/(DXM[i]*DXM[i])+4*fabs(S.g[0])/(S.froude*DXM[i])) +1E-15)); deltneu=min(deltneu, S.tfconv*2/(fabs(V[i][j][k])/DYM[j]+ sqrt( (V[i][j][k]*V[i][j][k])/(DYM[j]*DYM[j])+4*fabs(S.g[1])/(S.froude*DYM[j])) +1E-15)); deltneu=min(deltneu, S.tfconv*2/(fabs(W[i][j][k])/DZM[k]+ sqrt( (W[i][j][k]*W[i][j][k])/(DZM[k]*DZM[k])+4*fabs(S.g[2])/(S.froude*DZM[k])) +1E-15)); } // Viscosity deltneu=min(deltneu,S.tfdiff*S.re*0.5/(1./(xmin*xmin)+1./(ymin*ymin)+1./(zmin*zmin))); if(deltneu<1E-15) { printf("Maybe ERROR in parameters: Time-Step = 0.0 ! \n");exit(1); } if(S.TimeDis==1) { // Compute new time step (8 steps smoothing through parabola for AB) deltneu=(S.timesteps<9)?((1-((S.timesteps+1)*0.1-1)*((S.timesteps+1)*0.1-1))*deltneu):deltneu; } timer->Stop(oldtimer,Par); return deltneu; } |
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July 26, 2005, 14:44 |
Re: who know the software NaSt3DGP
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#8 |
Guest
Posts: n/a
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Hi all,
The NaSt3DGP is a multiblock or single block solver? thanks |
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