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Automatic post processing of Transient simulation

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Old   June 24, 2005, 04:47
Default Automatic post processing of Transient simulation
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I have been trying to do some post processing calculation for my transient simulation. I have done this per hand very often but now i want it to be automatic so that i can use it for optimization process.

My query is:

I want to calculate the total energy at the inlet and outlet of the nozzle which is time dependent. I used to write density, pressure and velocity at the inlet and outlet by exporting the values from chart in CFX-Post and than in Excel i did further calculation to find the nozzle efficiency in transient flow.

Any one know how can you use command editor in CFX-Post to store and calculate the sum of energy over time.

Just for reference the equations are like that:

Efficiency = Numerator / Denomenator

Numerator = Sum((Pressure * Velocity * Area)@outlet*DeltaT)+Sum((0.5*density*Area*Velocit y^3)@outlet

Denomerator = should be same as Numerator but calcualted for inlet


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Old   June 24, 2005, 12:34
Default Re: Automatic post processing of Transient simulat
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Can't you do that with CEL expressions?

What does Sum mean? Summation over the area, or over the time?What does DeltaT mean? Does T stand dor time or for temperature?

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Old   June 24, 2005, 14:37
Default Re: Automatic post processing of Transient simulat
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Refer to CEL user manual and then use PERL language for the programming syntax under command editor. It's pretty simple (I only spend one week to learn PERL and I can automate basically anything in Post now). There're quite some free references about PERL programming on Google.

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