advectiondiffusion equation
Hi, I am going to solve coupled navierstokes and advectiondiffusion equation. Is it possible to simulate these equations in FLUENT? If so, please tell me how to imply FLUENT to coupled navierstokes and advectiondiffusion equation. Thanks in advance.

Re: advectiondiffusion equation
By advectiondiffusion equation I assume you mean the transport of a scalar due to the flow.
Yes this is possible to do in FLUENT. Depending on what your scalar is you may be able to use internal standard FLUENT models (eg. species transport) otherwise you can write some C code to define the diffusion term and source term of the scalar when coupled with the flow equations. Greg 
Re: advectiondiffusion equation
YES!! you can simulate the advectiondiffusion process. I had tried some convectiondiffusion for gasgas and gasporous media. the result quite good.... but still need to figure out some thing for gasliquid system....
what version of the FLUENT u used?? FLUNET v6 got some glitch when calculating the concentration, the latest version corrected this glitch already. best luck!! tyw 
Re: advectiondiffusion equation
Thank you for your comments. I am trying to simulate the concentration (advectiondiffusion equation) coupled with flow (navierstokes equation). Do I need to write udf program or to use internal standard fluent model? Thank you in advance.

Re: advectiondiffusion equation
Currently i am using the internal code. do u have any similiar experiment result with u problme?? if u have then you may try to simulate the experiment and compare. if the result is quite good, then i believe no need to use a udf...
best luck, Ivan 
Re: advectiondiffusion equation
Thank you for your comments. No, we don't have experimental data. We are going to simulate the concentration of drug in the blood flow. Thus which part of Fluent manual do I have to read? Thank you in advance.

Re: advectiondiffusion equation
under the species transport section.
good luck for u simulation. 
Quote:
thank u very much Ivan. 
simple advection diffusion models
Hi,
I'd like to come back to the question of solving simple scalar time dependent advectiondiffusion equation in Fluent without energy coupling for a static (frozen flow field) e.g. contamination concentration http://http://en.wikipedia.org/wiki/...usion_equation where c is the concentration and v the fluid velocity Fluent offers transport models at 3 places 1. Thermal models 2. scalar transport models (UDS) 3. Transport & Reaction I understand the basic concepts in the Theory Guide but i get confused with all the different options in the menus and options. Could anyone guide me which model to choose and how to define the different transport parameters. Thanks a lot in advance. 
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