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Dynamic pressure from oscillation airfoil

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Old   May 16, 2023, 14:05
Default Dynamic pressure from oscillation airfoil
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yuval
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Hello everyone,

I try to find the efficient way to export data about dynamic pressure in 6 points on the airfoil in transient simulation (Fluent) when the angle of attack changes (using dynamic mesh).

I need the data of dynamic pressure for every time steps (in 6 difference points). The only way I thought of at the moment is inefficient, to manually export the dynamic pressure from each time step. It is important to note that I have over 60000 time steps.

Thanks for the help
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Old   May 17, 2023, 01:18
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The best thing to do is set up monitor points and have these saved to a file. But you would have to rerun the simulation.

The other approach would be to use a Scheme or, in a newer version of Fluent, Python script to load the data file and mine the data. Depending on the file size this could be very time consuming.
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Old   May 17, 2023, 02:53
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Quote:
Originally Posted by NickFL View Post
The best thing to do is set up monitor points and have these saved to a file. But you would have to rerun the simulation.

The other approach would be to use a Scheme or, in a newer version of Fluent, Python script to load the data file and mine the data. Depending on the file size this could be very time consuming.
if I will go with the monitor points way, the point will move with the airfoil during the simulation? because I using dynamic mesh on the airfoil.
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Old   May 23, 2023, 02:52
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If you want a richer understanding of pressures in flowing fluids, I'd encourage you to study the concept of "stress" in continuum mechanics. The hydrostatic pressure P that we are familiar with is isotropic: that is, it applies the same force/area in all directions, but this is not always the case.

In addition to a hydrostatic pressure, a flowing fluid can also have a "deviatoric" component of stress. This portion is not isotropic, and can accelerate the fluid velocity.
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Last edited by salmankhan886111; June 1, 2023 at 04:43.
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