Nusselt number
 

can anyone suggest me how to calculate the nusselt number from results?

I have a duct with L/D = 62 , ReD = 8100, all walls at constant heat flux. I want to cross check my results with Dittus- Boelter equation.

pl. do reply

Define a variable in CFD-Post with the equation for Nussult number. Then you can use this variable as a normal results file variable -you can plot it, get min/max, integrate it, graph it against something etc etc

how to create variable Nussult no in cfd post
 

i tried but not succeded in creating this varible with formula.......
please help

how did u try pritam?

what is your formula?

On CFD-POST first create an expression

Example: sqrt(Velocity w^2)

and name it ("nusselt", "my expression", or whatever)

Then on variables, create a new variable (also name it as you wish) and point the "expression" field to the expression you just created.