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3d fan zone doubt, different results between 3d fan zone and surface (pressure)

    • Sebastian Yañez

      I'm simulating a drone, working the propellers like 3d fan zones, so, when i'm in the 3d fan zone dialog box, I put the "pressure jump" that I calculated for that the drone has the lift force that I require (100Pascals) (between the upper and lower part of the 3d fan zone that represents the propeller and has the shape of a cylinder). But when I see the results of the surface integrals, in "total pressure" in field variable and "area-weighted average" in report type, between the upper and lower part of the fan zone (are flat faces) i get 78 Pascals. So my question is why does this happen, the "pressure jump" in the dialog box of the 3D fan zone is pressure total right?, and the results of surface integrals too? or the program simulates that there are pressure losses? Or something like pressure jump is a gauge pressure  and not total pressure (but when i get the results of static pressure, the results are not the same that this  pressure jump too), i have doubts, I don't know what is the asnwer, I think it should give me the same value, because I am looking for the result of a value that I entered myself, i have that doubts about 3d fan zones and and the results of that surface integrals in the pressure specifically and how works this 3d fan zones. So, that difference in values between the input value of pressure jump in 3d fan zone and the value obtained from pressure total (or static pressure) in surface integrals is what I can't understand.  (and sorry if something is not understood, english is not my native language). Attach some photos that represent the dialog box of the 3d fan zone and then the results of the surface integrals.

    • Essence
      Ansys Employee


      Could you please share the schematic of the model/geometry?

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