how to deal with the BC in FVM.
 

dear all,

anyboy send some reference to me? thanks a lot.

Re: how to deal with the BC in FVM.
 

There is no special difference in BC between FVM and FDS implementation, except that FVS is convinient to impose BC flux condition. Usually a row of Ghost Cell outside the computaional domain is supplemented so that the physical BC is met. e.g. on no-slip wall, U=0 is physical BC, then the velocity in Ghost cell meets (U_0+ U_1) /2 =0, where U_1 is neighbouring inner cell.

Re: how to deal with the BC in FVM.
 

a question in this context... Is it an absolute death to fv method using simpler/simple if someone (actually me)less farsighted accidentally places pressure nodes on a wall.....

Re: how to deal with the BC in FVM.
 

thanks for your help another question is that as you said the ghost cell is described U_0 and the first inner cell is U_1, is there grid point at solid wall?

Re: how to deal with the BC in FVM.
 

The wall is the interface between Mesh cell 0 and 1. No solution variable is located on the Wall.