CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

FVM in 1-D spherical coordinates

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   January 17, 2011, 10:06
Default FVM in 1-D spherical coordinates
Senior Member
Join Date: Apr 2009
Posts: 118
Rep Power: 8
lost.identity is on a distinguished road
I'm trying to obtain discretised equations in 1-D using FVM. It seems to me that there are two ways of doing it,

1) Firstly for the general momentum equation written in vector form (including divergence operators) I apply FVM (i.e. integrate over a control-volume and apply Gauss's theorem). I then write the resulting equation in 1-D spherical coordinates.

2) I write the momentum equation in 1-D spherical coordinates and I have extra geometric source terms compared with the Cartesian case. I then apply FVM (integrate over the volume). This is actually more like finite difference method.

I find the difference between the two discretisation is the extra geometric source terms. I'm not sure which method is more correct but I thought that in 1-D both FVM and finite-difference should yeild the same discretisation. Could anyone suggest which method is best?

lost.identity is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Spherical coordinates in Fluent orland FLUENT 0 November 18, 2010 04:22
Advection in spherical coordinates? lost.identity Main CFD Forum 0 October 11, 2010 12:03
k-epsilon model in spherical coordinates lost.identity Main CFD Forum 0 March 15, 2010 08:34
FVM using Cylindrical coordinates RameshK Main CFD Forum 0 December 29, 2009 01:59
Laplace in spherical coordinates Harini CFX 2 December 6, 2007 17:35

All times are GMT -4. The time now is 19:30.