LES or DES turbulence modeling with Lagrangian particle tracking

Robertsmj29@gmail.com · July 23, 2022, 04:11

Hi all,

I am a masters student currently looking for feedback and help with Star CCM+ Lagrangian particle modeling through a pipe. This includes applications like pneumatic particle conveying.

I would like to run a a Lagrangian particle tracking simulation with LES or DES turbulence model included. Does anyone perhaps know if this is plausible.

Star CCM+ returns a warning stating that a RANS turbulence model was expected. I anyone can assist me your response wil be greatly appreciated.

Kind regards
Michael Roberts

Aeronautics El. K. · July 24, 2022, 12:31

Hi Michael,

I don't think I can help with this one but I would advise you to use the discrete random walk for the lagrangian particles.

Robertsmj29@gmail.com · July 25, 2022, 09:17

Hi Lefteris,

Thanks for your advice. I believe random walk model in Star ccm+ is named the turbulent dispersion. Please correct me if I am wrong. I have run some of these simulations with turbulent dispersion on but still found difficulty in relating experimental measured data to simulated results.

But I am still looking for the reason why LES and DES is incompatible with Lagrangian particle tracking. If someone knows please send a reply.

Kind regards
Michael

July 23, 2022, 04:11	LES or DES turbulence modeling with Lagrangian particle tracking	#1
Robertsmj29@gmail.com New Member Michael Join Date: Jul 2022 Posts: 2 Rep Power: 0	Hi all, I am a masters student currently looking for feedback and help with Star CCM+ Lagrangian particle modeling through a pipe. This includes applications like pneumatic particle conveying. I would like to run a a Lagrangian particle tracking simulation with LES or DES turbulence model included. Does anyone perhaps know if this is plausible. Star CCM+ returns a warning stating that a RANS turbulence model was expected. I anyone can assist me your response wil be greatly appreciated. Kind regards Michael Roberts

July 24, 2022, 12:31		#2
Aeronautics El. K. Senior Member Lefteris Join Date: Oct 2011 Location: UK Posts: 337 Rep Power: 15	Hi Michael, I don't think I can help with this one but I would advise you to use the discrete random walk for the lagrangian particles. __________________ Lefteris

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July 25, 2022, 09:17		#3
Robertsmj29@gmail.com New Member Michael Join Date: Jul 2022 Posts: 2 Rep Power: 0	Hi Lefteris, Thanks for your advice. I believe random walk model in Star ccm+ is named the turbulent dispersion. Please correct me if I am wrong. I have run some of these simulations with turbulent dispersion on but still found difficulty in relating experimental measured data to simulated results. But I am still looking for the reason why LES and DES is incompatible with Lagrangian particle tracking. If someone knows please send a reply. Kind regards Michael