Static pressure and Air Flow Value

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  • Last Post 25 February 2019
monicaagabriela6 posted this 24 February 2019

Hello, 

I have produced a CFD simulation of an axial fan. I am trying to compare the results from the simulation against the experimental results. How can I produce the fan performance curves of the static pressure against the air flow? How can I extract the air flow value? I am trying to produce a graph similar to the one below for my axial fan. How can I do that? Thank you so much!

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abenhadj posted this 25 February 2019

Usually the pressure increase over the fan via two report definition after and before the fan. The flow rate can be reported downwards or before the fan.

Best regards,

Amine

monicaagabriela6 posted this 25 February 2019

Could you please guide me step by step on how to see the air flow value? All I have done so far is to get some contour an stream lines. How can I get the tabular data for it?

rwoolhou posted this 25 February 2019

You can report surface integrals in Fluent of pressure, and also mass flow via the Fluxes (all under reports or Post processing: tree & top menus respectively). 

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monicaagabriela6 posted this 25 February 2019

I think there is something wrong with my simulation. I am getting a very high flow rate (8x higher than expected). I used for my boundary conditions at the inlet, Pressure Inlet and for the Gauge Total Pressure I put 101325Pa. For the outlet, I chose the Pressure Outlet, and the value assigned for gauge pressure I put 101725 (which is 101325 + 400). I also chose the target mass flow rate option and I put the value for the expected flow rate which should 12.1m^3/s. 

I have got these values from the fan performance curves that I already have and I want to produce the simulation to get something similar from the simulation (so on my fan performance curve attached in the first post the volume flow rate is 12.1 at 400 Static Pressure.

Is this correct or I got them all wrong? Can you please guide me on how to choose the right boundary conditions for this simulation?Thank you so much!

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