Dynamic meshing

lukesheehan27 · January 19, 2018, 12:53

Hi guys,

I want to create a dynamic mesh in star-ccm+. Effectively I've got a helicopter rotor and I want to rotate this rotor during the simulation.

I've had a look on the tutorial and help guides as well as videos on youtube and I can't find anything that explains how to do it. If anyone knows how can you please give me instructions?

Thanks
Luke

fluid23 · January 19, 2018, 16:40

You must have not looked very hard. There are several options depending on what you want to get out of your solution. MRF is nice, but doesn't really capture some dynamic effects. RBM is the brute-force method where you have a sliding mesh and your rotor moves. My personal favorite is the BEM method which is great if you want the effect of the rotor without actually modeling and meshing it.

User Guide > Tutorials > Motion > Rigid Body Motion: Moving Reference Frame

User Guide > Tutorials > Motion > Rigid Body Motion: Rotating Fan

User Guide > Tutorials > Motion > Blade Element Method: Helicopter Rotor-Fuselage Interaction

ashokac7 · January 22, 2018, 04:17

Quote:

Originally Posted by lukesheehan27

Hi guys,

I want to create a dynamic mesh in star-ccm+. Effectively I've got a helicopter rotor and I want to rotate this rotor during the simulation.

I've had a look on the tutorial and help guides as well as videos on youtube and I can't find anything that explains how to do it. If anyone knows how can you please give me instructions?

Thanks
Luke

If you compare to Fluent then both have MRF as well as Sliding mesh. But for dynamic mesh CCM have Overset capability. In Overset you have component mesh and background mesh. So you can have rotation or translation or both which is not possible in Sliding as it can have rotation only. Give more inputs to your problem so that better comment can be done

lukesheehan27 · January 22, 2018, 15:04

Hi, thanks for the help guys. I'd tried the moving reference frame and rigid body motion methods before but couldn't make sense of them. I went back and I think I'd been screwing up at incorrectly creating the interfaces but its working now thankfully. Cheers.

January 19, 2018, 12:53	Dynamic meshing	#1
lukesheehan27 New Member luke sheehan Join Date: Jan 2018 Posts: 6 Rep Power: 8	Hi guys, I want to create a dynamic mesh in star-ccm+. Effectively I've got a helicopter rotor and I want to rotate this rotor during the simulation. I've had a look on the tutorial and help guides as well as videos on youtube and I can't find anything that explains how to do it. If anyone knows how can you please give me instructions? Thanks Luke

January 19, 2018, 16:40		#2
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 18	You must have not looked very hard. There are several options depending on what you want to get out of your solution. MRF is nice, but doesn't really capture some dynamic effects. RBM is the brute-force method where you have a sliding mesh and your rotor moves. My personal favorite is the BEM method which is great if you want the effect of the rotor without actually modeling and meshing it. User Guide > Tutorials > Motion > Rigid Body Motion: Moving Reference Frame User Guide > Tutorials > Motion > Rigid Body Motion: Rotating Fan User Guide > Tutorials > Motion > Blade Element Method: Helicopter Rotor-Fuselage Interaction alireza.razeghi likes this.

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January 22, 2018, 15:04		#4
lukesheehan27 New Member luke sheehan Join Date: Jan 2018 Posts: 6 Rep Power: 8	Hi, thanks for the help guys. I'd tried the moving reference frame and rigid body motion methods before but couldn't make sense of them. I went back and I think I'd been screwing up at incorrectly creating the interfaces but its working now thankfully. Cheers.