How to calculate drag forces?
 

Good afternnon,

First of all, sorry for my limited knowledge. I've just three days working with Flow3D.

I have a solid in .STL format, and I want to calculate the drag force of this solid, but I can't find the tool to calculate it.

I did some simulations and I calculated the pressure, velocity magnitude... but I don't know how calculate drag forces. I don't know if I have to activate some options in Physics or Meshing&Geometry...

I hope your answers.

Thanks in advance

R

You should select "Pressure and Shear Force" and "Wetted Area" outputs from

Meshing&Geometry>Component Properties>Component # > Output > click them and run simulation,

Then go to Analyze tab,

Analyze > Probe > General history > Select Component1 Fluid Force and render.

Why should I click integrate option? is not drag force= component1 fluid force= pressure+shear ??

If I click only component1 fluid force= pressure+shear wihout any click, the graph becomes constant over time, so I would have the force value, but if I click integrate option, the graph is rising over time.

What is the real value of drag force?

Sorry for confusion :D.

The Pressure Force values are already integrated values over area.

The "integrate" option is for time integral of value.

So,dont use integrate option, use "component1 fluid force" value.