# SOU for convection term

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 April 13, 2010, 17:25 SOU for convection term #1 Member   Ardalan Join Date: Feb 2010 Location: Baku Posts: 50 Rep Power: 9 How can we discretize convection term by using SOU (second order upwid) for non-orthogonal structured mesh? I know the formula for uniform orthogonal mesh: phi_f=3/2*phi_c-1/2*phi_u

 April 14, 2010, 23:48 #2 Member   ganesh Join Date: Mar 2009 Posts: 40 Rep Power: 10 Dear Ardalan, You could try schemes such as QUICK and SMART among others. Regards, Ganesh

 April 15, 2010, 03:03 #3 Member   Ardalan Join Date: Feb 2010 Location: Baku Posts: 50 Rep Power: 9 thanks for your answer but what is the formula for non-orthogonal grids? I have this formula for QUICK in uniform grid: phi_f=3/4*phi_c+3/8*phi_D-1/8*phi_u

 April 17, 2010, 16:10 my opinion #4 Member   Wu Jian Join Date: Jun 2009 Location: Poitiers Posts: 33 Rep Power: 10 For this problem, the key difficulty is to define the far upwind point's value. Certainly , you can use the point already existed (as the grid is structured) and in fact, this point is not exactly the far upwind. you should define the far upwind point. you can check some articles about the TVD unstructured grid. For more information, contact me. the mail address. xikuanghit@gmail.com

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