感谢回复李老师但应该不是时间步长的问题。无论时间步长取得多短，总会在第五步出现发散

Time = 6e-05

Courant Number mean: 1.96719e+25 max: 9.01107e+27
#0  Foam::error::printStack(Foam::Ostream&) at ??:?
#1  Foam::sigFpe::sigHandler(int) at ??:?
#2  ? in "/lib/x86_64-linux-gnu/libc.so.6"
#3  Foam::symGaussSeidelSmoother::smooth(Foam::word const&, Foam::Field<double>&, Foam::lduMatrix const&, Foam::Field<double> const&, Foam::FieldField<Foam::Field, double> const&, Foam::UPtrList<Foam::lduInterfaceField const> const&, unsigned char, int) at ??:?
#4  Foam::symGaussSeidelSmoother::smooth(Foam::Field<double>&, Foam::Field<double> const&, unsigned char, int) const at ??:?
#5  Foam::smoothSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:?
#6  ? in "/opt/openfoam6/platforms/linux64GccDPInt32Opt/bin/icoFoam"
#7  ? in "/opt/openfoam6/platforms/linux64GccDPInt32Opt/bin/icoFoam"
#8  ? in "/opt/openfoam6/platforms/linux64GccDPInt32Opt/bin/icoFoam"
#9  ? in "/opt/openfoam6/platforms/linux64GccDPInt32Opt/bin/icoFoam"
#10  __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#11  ? in "/opt/openfoam6/platforms/linux64GccDPInt32Opt/bin/icoFoam"

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