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Tumble calculation Ricardo Formula (Angular Moment Flux)

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Old   November 20, 2018, 11:24
Default Tumble calculation Ricardo Formula (Angular Moment Flux)
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Andrea
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Hello, I'm doing a steady flow simulation of a flow bench and I'm trying to calculate the Tumble Number with the Ricardo Formula

(8*Moment)/(Massflow*Bore*Isentropic_Velocity).

I'm having some trouble in calculating the Moment in my simulation in order to compute the Tumble number.
I have created a volume threshold in order to calculate the Moment in a specific region with a local Coordinate system (Tumble_cs) and I've calculated the angular momentum (Kg*m^2/s), with the following field function:

${Density}*${Volume}*($${Centroid}(@CoordinateSyst em("Tumble_cs"))[0]*$${Velocity}(@CoordinateSystem("Tumble_cs"))[1] -$${Centroid}(@CoordinateSystem("Tumble_cs"))[1]*$${Velocity}(@CoordinateSystem("Tumble_cs"))[0])

I've created a sum report of this field function computed in the threshold I was talking before.

By far I know that it could be possible to obtain the Moment in this region if I could compute the Angular momentum flux (Kg*m^2/s^2 = Nm).


Thanks in advance for the help

Last edited by andreadepa; November 21, 2018 at 07:43.
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