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-   -   Brikman Number (http://www.cfd-online.com/Forums/fluent/43609-brikman-number.html)

majid reza mahjoob February 5, 2007 03:09

Brikman Number
 
Hi, any can help me to define the Brikman Number in fluent?

Swarup February 5, 2007 04:24

Re: Brikman Number
 
use custom field functions in define menu; you define Brinkman number using the buttons for operators and variables from the adjacent list of variables.

Swarup.

majid reza mahjoob February 5, 2007 07:09

Re: Brikman Number
 
Hi Swarup thanks for your attention.how can apply the effect of amount of Brikman Number in solution of convective heat transfer by fluent? if you know please help me? mahjoob

Swarup February 6, 2007 00:21

Re: Bri(n)kman Number
 
First, read the help manual for modeling heat transfer.

Bri(n)kman number is used to assess importance of viscous heating of a fluid (which may also be caused by wall conduction). So, it will be ususally important only for viscous fluids like polymers. It can also be important in compressible flows. It is important when it exceeds or equals unity. So, please check this first.

Then if it necessary to include it, enable viscous heating option if you are using segregated solver. If you need to use coupled solver, then viscous dissipation is included by default.

Swarup.


majid reza mahjoob February 6, 2007 01:31

Re: Bri(n)kman Number
 
Hi Swarup I simulation the dimensionless microchannel, in the Temperature constant boundary condition in the heating the fluid, 2 problems occur: 1- in the heating Tw>Te But the dimensionless temperature of wall (tetta-w) become zero and dimensionless temperature of inlet (tetta-e) become one its mean that

majid reza mahjoob February 6, 2007 01:32

Re: Bri(n)kman Number
 
2-in heating Brinkman Number is negative and in cooling the Brinkman Number is positive, how effect the amount of Brinkman Number in simulation dimensionless of heating



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