STAR-CCM+ Hands on Tutorial | Darpa Suboff CFD Validation Study
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- Опубликовано: 11 мар 2022
- This video is about Star-CCM+ hands on tutorial to perform the hydrodynamic simulation of a Darpa submarine body. This tutorial will guide you how to import the geometry and extract the fluid volume to perform trimmed viscous meshing within Star-CCM+. Followed by geometric sources used to perform local refinement in the important regions of submarine. Afterwards, the solver setup and boundary conditions used for incompressible turbulent flow using K-Omega SST turbulence model from Menter. Finally the post-processing including residual plot, resistance force monitor and comparison with the experiments.
#cfd #starccm #meshing
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References:
1. DTRC/SHD-1298-01 March 1989, GEOMETRIC CHARACTERISTICS OF DARPA SUBOFF MODELS (DTRC MODEL NOS. 5470 and 5471) by Nancy C. Groves, Thomas T. Huang, Ming S.
2. Chang
CRDKNSWC/HD-1298-11 June 1998, Hydromechanics Directorate Summary of DARPA Suboff Experimental Program Data by Han-Lieh Liu, Thomas T. Huang
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Great work! Congrats 👏
You are welcome thanks for the nice comment.
very good video
You are welcome thanks for the feedback.
Sir, I have been through to other RUclips videos on interpreting external CFD, but to be honest I understood your every explanation of this video very well. So, as your subscriber, it's a kindly request from my end if you can make a video on CFD on 2 bladed/3 bladed / 4 bladed propeller for finding RPM using MRF method, so that we can learn this important topic as well.
great work. How did you model the darpa suboff? Using the computer code or by using the equations of the curves? Can you explain this please.
such a great tutorial thank you it is really very helpful
is the geometry available ?
hi, the video was really nice and good. May I know how did you manage to attach the stern cruciform control planes and the sail to the bare hull? Wasnt there any gap between control planes and bare hull or did you used any filling technique such as mesh repair tool in CCM+ to fill the gyap?
Thanks for the feedback, well the appendages are modelled using some boolean operations to get single body.
Thanks for sharing. Could you explain how can we take into account the submergence depth?
You are welcome by the way submerging depth can be taken into account using Froude number. Normally the usual range of the Froude number of naval submarines is 0.15~0.25.
Awesome. Could you please share the CAD file of Darpa Suboff?
I would suggest the paper mentioned in the description about how to model the geometrical characteristics of the model. Thanks
How were the parametric equations converted to co-ordinates?
MatLab or Excel?
for sst-kw model shouldn't we calculate the prism layer thickness and number of prism layers to find proper y+ ?
Thanks for the query, well in Star-CCM+ sst-kw model uses all y+ model formulation to capture both low- and high-Reynolds number meshes. That means for incompresdible flows the boundary layer is thick and you can deal with y+ in between 30 ~100.
excellent explanation from your end, but I have a question, for the appendages, if the starting and ending radius are the same, then it's also possible to select cylinder not cone as the block ?
Well you can also take cylinder instead of Cone.
@@Simulation-Engineer Thank-you sir for clarifying my doubt. One more question from my end is can I do this whole setup for aeroplane fuselage? Will it sound good ?
Well you can use the similar setup for an aircraft.
@@Simulation-Engineer Thankyou sir for your timely response.
Is the Resistance measured here is half of total resistance, as we are using only half model?
That's true CFD results are half the total resistance. For comparison you need to double that, thanks.
how much time did it took for running volumetric mesh ? May I know your system performance details please.
Well it didn't take too much time and ia m using intel quadcore machine with 8GB ram.
@@Simulation-Engineer Thank-you sir for your information. I overwhelmed. :)
Please could you share the CAD file ??
I would suggest the paper mentioned in the description about how to model the geometrical characteristics of the model. Thanks
@@Simulation-Engineer Ok, thank you
Could you please share the CAD file?
I would suggest the paper mentioned in the description about how to model the geometrical characteristics of the model. Thanks