[pradip.c1000]

i m trying to calculate lift of a cylinder in a 2D flow using viscous laminar model but i m not getting correct magnitude of the answer.. i doubt the system is not using the correct governing equation... how do i know what governing equation fluent is using in viscous laminar model and how can i modify it if required??

[Bruno Machado]

Originally Posted by pradip.c1000

i m trying to calculate lift of a cylinder in a 2D flow using viscous laminar model but i m not getting correct magnitude of the answer.. i doubt the system is not using the correct governing equation... how do i know what governing equation fluent is using in viscous laminar model and how can i modify it if required??

have a look at the manuals and you will know what equations fluent solves and also make sure you are supplying all the variables in the right unity. If still you think it is not what you want, you need to write a UDF for the scalars you want to transport and add all the physics through source term.

[pradip.c1000]

Bruno Machado,
Thank you very much for your timely reply.

[pradip.c1000]

hi bruno machado

looked into the help but it does not show governing equation for the viscous and the laminar flow... it shows the governing equations for the rest....guess i need to take some udf lesson.... anyways thanks for ur attention and advice....

[Bruno Machado]

Originally Posted by pradip.c1000

hi bruno machado

looked into the help but it does not show governing equation for the viscous and the laminar flow... it shows the governing equations for the rest....guess i need to take some udf lesson.... anyways thanks for ur attention and advice....

hi pradip,

you can find it here
http://aerojet.engr.ucdavis.edu/flue...ug/node382.htm

regards

[pradip.c1000]

hi bruno
can u help me by telling how to make a laminar model also incompressible?? i m not getting correct solution...
thanks

[Bruno Machado]

Originally Posted by pradip.c1000

hi bruno
can u help me by telling how to make a laminar model also incompressible?? i m not getting correct solution...
thanks

the you define the density of you material, you can specify which kind of flow it is (compressible, incompressible, real gas, ideal, etc.).