Center of Mass of Two-Phase Flow

JoshuaSmith · March 14, 2018, 13:46

Here is a simplified description of the original problem.

I have a tank of two fluids (for example water and air). I am looking at the sloshing of the fluids as the tank is pitched upward. This sloshing will shift the center of mass since the two fluids have different densities. I am interested in writing the center of mass of the volume as a function of time. I know that the center of mass (for example for x) is determined by the triple integral of x*density with the integral divided by the total mass (http://www.math.wpi.edu/Course_Mater...abs/node3.html). I also know you can take the volume integral of density. I think the center of pressure calculation would only work in specific cases (no pitch).

Is there a built in function, or a way to take the volume integral of a custom function, that would give the center of mass of the fluid and output it as a monitor? Thank you.

Joshua

spaceplumber · October 2, 2018, 14:49

Did you ever find a solution to this problem? I'm trying to make a similar simulation which will output the center of mass, but have yet to figure out how to do that.

March 14, 2018, 13:46	Center of Mass of Two-Phase Flow	#1
JoshuaSmith New Member Joshua Smith Join Date: Mar 2018 Posts: 4 Rep Power: 8	Here is a simplified description of the original problem. I have a tank of two fluids (for example water and air). I am looking at the sloshing of the fluids as the tank is pitched upward. This sloshing will shift the center of mass since the two fluids have different densities. I am interested in writing the center of mass of the volume as a function of time. I know that the center of mass (for example for x) is determined by the triple integral of x*density with the integral divided by the total mass (http://www.math.wpi.edu/Course_Mater...abs/node3.html). I also know you can take the volume integral of density. I think the center of pressure calculation would only work in specific cases (no pitch). Is there a built in function, or a way to take the volume integral of a custom function, that would give the center of mass of the fluid and output it as a monitor? Thank you. Joshua

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October 2, 2018, 14:49		#2
spaceplumber New Member Emily Join Date: Sep 2018 Posts: 10 Rep Power: 8	Did you ever find a solution to this problem? I'm trying to make a similar simulation which will output the center of mass, but have yet to figure out how to do that.