How to create velocity profile for falling ball in fluent CFD post processing

valr · June 13, 2018, 05:29

Hi,

I am trying to calculate terminal velocity for a ball(sphere) when dropped into a tank full of water.

I am using 3ddp, pressure based, dynamic mesh(smoothing and remeshing), laminar, transient solver.

After running the simulation, I am unable to plot the velocity profile of the sphere during its motion w.r.t its Y position. (ie velocity variable along y-axis and its location in y along x-axis).

I would be highly obliged if anyone could help me in plotting this graph.

Thanks.

EnriqueP · June 13, 2018, 06:05

Hello valr,

I would recomend you to create a different report in calculation activities. I am studing a similar setup and what I do is ask for an ASCI file with the X, Y coordinates and X,Y velocities (in your case could be differents since mine is 2D) of the body for each time step.

After that I use python to represent the motion and velocity of the center of gravity. You can use the software of your choice.

I haven't tried to plot this variables in the post porcessing tool.

Enrique P.
__

valr · June 13, 2018, 06:18

Thanks for your reply,

Will try to follow your method and update you.

June 13, 2018, 05:29	How to create velocity profile for falling ball in fluent CFD post processing	#1
valr New Member Join Date: Jun 2017 Posts: 9 Rep Power: 8	Hi, I am trying to calculate terminal velocity for a ball(sphere) when dropped into a tank full of water. I am using 3ddp, pressure based, dynamic mesh(smoothing and remeshing), laminar, transient solver. After running the simulation, I am unable to plot the velocity profile of the sphere during its motion w.r.t its Y position. (ie velocity variable along y-axis and its location in y along x-axis). I would be highly obliged if anyone could help me in plotting this graph. Thanks.

June 13, 2018, 06:05		#2
EnriqueP New Member Enrique Pérez Heredia Join Date: May 2018 Location: Madrid, Spain. Posts: 16 Rep Power: 7	Hello valr, I would recomend you to create a different report in calculation activities. I am studing a similar setup and what I do is ask for an ASCI file with the X, Y coordinates and X,Y velocities (in your case could be differents since mine is 2D) of the body for each time step. After that I use python to represent the motion and velocity of the center of gravity. You can use the software of your choice. I haven't tried to plot this variables in the post porcessing tool. Enrique P. __ __________________ Loading signature...

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June 13, 2018, 06:18		#3
valr New Member Join Date: Jun 2017 Posts: 9 Rep Power: 8	Thanks for your reply, Will try to follow your method and update you.