simultaneously solve number of diffusion equations -- CFD Online Discussion Forums

August 26, 2014, 08:21

simultaneously solve number of diffusion equations

Shakil Masum

New Member

Shakil Masum

Join Date: Aug 2014

Posts: 11

Rep Power: 11

Hi,

I want to solve these equations using OpenFOAM. The diffusion equations are:

dC0/dt = D1 d2/dx2 C0
dC1/dt = D1 d2/dx2 C1 + D2 d2/dx2 C0 (please check the attachment, I have typed them properly in the attachment).

I can solve the equations using Laplacian Foam individually. But, I want to solve both equations simultaneously, I mean in every time steps. The problem is the second equation needs the value of C0 (from first equation) in every time step. What changes are required in laplacianFoam.C and also in the '0', 'constant' and 'system' folders? It will be much appreciated.

thanks
shakil

Attached Images

Screen Shot 2014-08-26 at 13.08.35.png (12.6 KB, 43 views)

Tags

diffusion, laplacian

« Previous Thread | Next Thread »

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 Off Pingbacks are On Refbacks are On Forum Rules

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
timeVaryingMappedFixedValue: large data mapping on complex inlet boundaries	vkrastev	OpenFOAM Pre-Processing	7	June 2, 2016 15:50
compressible flow in turbocharger	riesotto	OpenFOAM	50	May 26, 2014 01:47
decomposePar pointfield	flying	OpenFOAM Running, Solving & CFD	28	December 30, 2013 15:05
AMI interDyMFoam for mixer	danny123	OpenFOAM Running, Solving & CFD	4	June 19, 2013 04:49
modify fvMatrix / coupled equations / higher order diffusion	Jinming	OpenFOAM Programming & Development	0	May 7, 2011 06:20

All times are GMT -4. The time now is 06:12.