I want to simulate bead collision in fluid, the bead size is similar to the fluid flow characteristic length, e.g. 1/5 of flow depth. I found that most of existing CFD-DEM coupling code or software can only deal particles which are much smaller that mesh size. And I do believe the wake and other flow features around bead should be resolved in my problem. I am looking for a more direct and simple method than linking a cfd code with dem code using immersed boundary method, anyone get a clue?
Yi,
You may want to check our our method with coarse graining based on diffusion. It can deal with particles that are comparable to the cell size. The code is called "sediFoam", available publicly at:
https://github.com/xiaoh/sedifoam
Related publications are attached below. Contact me at [email protected] for further information.
Alternatively, you should look at immersed boundary method which resolves particle boundaries. This would work if you have a small number of particles (e.g., less than 100); See the work of (Kempe & Frohlich), cited in our works.
Best,
Heng Xiao
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Heng Xiao, Ph.D.
Assistant Professor
Aerospace and Ocean Engineering
Virginia Tech
311-A Randolph Hall (0203)
Blacksburg, VA 24061, USA
T: +1 (540) 231 0926
W: https://sites.google.com/a/vt.edu/hengxiao/
http://www.aoe.vt.edu/people/faculty/xiao.html
R. Sun* and H. Xiao. SediFoam: A general-purpose, open-source CFD-DEM solver for particle-laden flows with emphasis on sediment transport. Computers and Geosciences, 89, 207-219, 2016. DOI: 10.1016/j.cageo.2016.01.011 Also available at: arxiv: 1601.03801
R. Sun* and H. Xiao. Diffusion-based coarse graining in hybrid continuum–discrete solvers: Theoretical formulation and a priori tests. International Journal of Multiphase Flow, 77, 142-157, 2015. DOI: 10.1016/j.ijmultiphaseflow.2015.08.014 Also available at: arxiv:1409.0001
R. Sun* and H. Xiao. Diffusion-based coarse graining in hybrid continuum–discrete solvers: Applications in CFD–DEM. International Journal of Multiphase Flow, 72, 233-247, 2015. DOI: 10.1016/j.ijmultiphaseflow.2015.02.014 Also available at arxiv:1409.0022
Prof. Xiao,
Thank you very much for your kindly reply. I met Dr. R.Q. Wang yesterday and saw the application of your code on oil plume problem. Fantastic code!
I will deploy the code ASAP and apply it on my problem. I would like to return here with some feed back to push this question forward.
Thank you again!
Best regards!
Yi AN
Yi,
I do think our code has some unique features and algorithms that are lacking in other similar, more general-purpose CFD-DEM codes. We have also taken care to write a lean, efficient code, and we used state-of-the-art software engineering practices. However, on the other hand, due to the lack of resources, our documentation is lacking. So far, only a few collaborators are using the code (R. Wang at Berkeley; Dr. H. Sun at ZJU; Dr. Prashant at University of Newcastle). I do hope more people can benefit from the code and push it forward.
Heng
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