CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   Main CFD Forum (http://www.cfd-online.com/Forums/main/)
-   -   3Dspherical (http://www.cfd-online.com/Forums/main/1274-3dspherical.html)

rameez September 9, 1999 21:19

3Dspherical
 
Please tell me your idea and considerations in doing calculation on 3D Spherical coordinate by finite difference method

Hongjun Li September 10, 1999 09:49

Re: 3Dspherical
 
Everything is similar EXCEPT at the origin r=0, the difference method at r=0 is different and needs special treatment. This is the first thing I thought. Try to solve a simple heat conduction equation you may find the problem.

HL

Rameez,MYM September 12, 1999 19:08

Re: 3Dspherical
 
When I make it into conservative form, In momentem equations, the velocity component are left behind. Can I treat them as production term?


weiming sha September 13, 1999 05:12

Re: 3Dspherical
 
Please check the paper "An accurate second-order approximation factorization method for time-dependent incompressible Navier-Stokes equations in spherical polar coordinates, W.sha, K.Nakabayashi and H.Ueda, J. Comput. phys.142, 47-66, 1998". Hope it would help you.

Hongjun Li September 13, 1999 09:06

Re: 3Dspherical
 
The N-S equations in the cylinderial and spherical systems can not be written into fully conservation form. I think you can treat the extra terms as production terms (source term).


All times are GMT -4. The time now is 21:20.