Learning Forum

[atulsingh92]

I want to define a report def using periodic pressure gradient, that is already created, once the periodic interfaces are defined in 2019R2.

for this I have the following command which is essentially an expression of friction factor ,

here volume is a volume of domain, wetsurface is the walled area surface, rho and vy are the mass avg and area avg reports , successfully created before reaching the above line

/solve/report-definitions/add frictionfactor expression define (4*volume/wetsurface*(periodic-pressure-gradient/(0.5*rho*vy^2)

Now, i tried, initializing the flow first, and then setting the v-y, v-x and v-z velocity defaults to 0.1 each. (also vice versa)

But always, the batch script fails at this step and I am not able to use periodic-pressure-gradient inside a report definition expression.

Any thoughts on how can I correct this?

[Rob]

Maybe don't explicitly use the periodic-pressure-gradient inside a report definition?  

[atulsingh92]

The expression mentioned above would be an output parameter, and hence, is desirable.

I do have the periodic pressure gradient as an report file to monitor convergence, but if I can use other report definitions in my expressions, so why not periodic pressure gradient?

 

[Rob]

Is it because you've mistyped something in the expression?