Learning Forum

[mbuck4640]

Hi everyone,

I am trying to automate a large CFD study in Ansys Workbench 2025 R2 using Fluid Flow (Fluent with Fluent Meshing) and I need some help with the correct workflow for parameterizing a rotation in Ansys Discovery 2025 R2 SP4. My goal is to run many yaw angle cases automatically for a simplified underwater ROV vehicle (modeled as essentially a rectangular cube, cuboid, etc.).

So, I have the simple rectangular ROV body, a fixed fluid enclosure around it, and I've done successful manual runs in Fluent with the desired parameters locked in for meshing, solving, etc.

For each manual yaw case, I (1) rotate the ROV block about its center (2) subtract/cut it from the enclosure to make the fluid volume (3) mesh, solve in fluent, repeat.

However I want to automate this process, and to create a parameter for yaw angle so that I can rotate the ROV about a fixed center point, regenerate the geometry/subtract automatically, and then ideally drive the runs through the Workbench parameters/design points.

My current issue is that I can't seem to find any tutorials or documentation that mimick the same motion that I aim to do.

I am currently: selecting the ROV body/component in the left tree, I click Move, the move tool then shows a triad/axis at the body center of the ROV, I then click the green rotation arc (yaw about Y). I see a small icon for geometric parameterization, but it is always grayed out. I've seen in one of the Ansys geometric parameters tutorials to use the Ruler tool to create some sort of ruler dimension, but I'm not finding any success. It says to click the axis of motion you want, then to select some reference. I've tried to select different parts of the fluid enclosure (that should stay static throughout) but it doesn't seem to do anything.

For more context, I want the ROV to be only rotated, not translated, with the intended rotation center staying fixed, and flow direction is along -Z.

Ideally I am hoping to create one master model where I can vary yaw angle (and potentially other directions), as well as inlet velocity, and then run many cases automatically instead of manually rebuilding each angle. This may not be the best method, but it is the way I learned to do it.

Hopefully that is enough information to understand what I am trying to achieve here. I appreciate any help greatly.

[Devendra Badgujar]

Hello,

Thanks for the details. I would recommend another way of creating parameters in Discovery i.e using History tracking. 

Move angle creation using History tracking is simple and you can easiely modify and iterate multiple designs. 

History Tracking — Part 3 | ANSYS Innovation Courses

Regards,

Devendra