How to calculate moment of inertia for the falling box?

Hossein1 · January 11, 2017, 12:03

While falling box works well with the actual dimensions, it does not give a reasonable result when you scale-down the box dimensions.

Hossein1 · January 14, 2017, 21:04

I tried changing UDF as well as applying some other adjustments. However, I finally found out the reason is that when solving a 2D problem, Fluent considers a depth of 1m for those objects, and that's what we need to consider in calculating the mass of the scaled object (for instance, a box of 2mm * 2mm * 1000mm)

January 11, 2017, 12:03	Why the falling box does not work properly after scaling down?	#1
Hossein1 Member Join Date: Jun 2015 Posts: 46 Rep Power: 11	While falling box works well with the actual dimensions, it does not give a reasonable result when you scale-down the box dimensions. Last edited by Hossein1; January 14, 2017 at 21:04.

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January 14, 2017, 21:04		#2
Hossein1 Member Join Date: Jun 2015 Posts: 46 Rep Power: 11	I tried changing UDF as well as applying some other adjustments. However, I finally found out the reason is that when solving a 2D problem, Fluent considers a depth of 1m for those objects, and that's what we need to consider in calculating the mass of the scaled object (for instance, a box of 2mm * 2mm * 1000mm)