Learning Forum

[shantashreejena97]

Hi,

I am simulating a rotary damper with magnetorheological fluid in Fluent to know the relationship between the torque generated and the rotational velocity of the rotor. I have made a fluid domain in the gap between the rotor and the cylinder and assigned the fluid properties (density, viscosity). As a boundary condition, I have assigned the frame motion cell zone condition to the rotor with a rotational velocity of 6.5 rad/s in the y direction. I have also assigned no-slip condition to the wall of the fluid domain. When I am trying to calculate the moment for the rotor in the y direction it is coming out as 0. Could anyone help me solve how to calculate the torque using these boundary conditions to plot a graph between torque vs velocity?

 

[Rob]

How does the flow field look? Getting precisely zero generally means something isn't moving.