COMSOL Forums: Cement flowing around funky 3D shape and displacing mud
http://www.comsol.com/community/forums/general/thread/33576/
Most recent forum messagesSun, 03 Feb 2013 22:11:54 +0000COMSOL Forums: Cement flowing around funky 3D shape and displacing mudhttp://www.comsol.com/shared/images/logos/comsol_logo.gif
http://www.comsol.com/community/forums/general/thread/33576/
Re: Cement flowing around funky 3D shape and displacing mud
http://www.comsol.com/community/forums/general/thread/33576/#p95058
Hi, I found some empirical information that may significantly simplify the problem. for a first order approximation: if the flow is turbulent then the cement slurry will displace the drilling mud. So the problem becomes one of 3D flow to identify whether any zones around the object will have only laminar flow,<br />
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What I think would then be valid is to assume turbulent flow, solve with k-e, find the lowest Reynolds number, and check that the Re is large enough that the turbulent assumption is valid. Do you agree?<br />
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Regards, JohnSun, 03 Feb 2013 22:11:54 +000033576.1359929514.95058Re: Cement flowing around funky 3D shape and displacing mud
http://www.comsol.com/community/forums/general/thread/33576/#p92655
Hi John,<br />
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I heard back from one of our in-house experts and here are some snippets:<br />
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> This sounds difficult. The implementation would need a two-phase flow, where one of the phases (cement) is a non-newtonian fluid. Whether to use level-set, phase-field or euler-euler is not clear to me. Which thixotropy model to use for the concrete is also a research area.<br />
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How well the COMSOL solvers are suited for this task is also unknown. But you can give it a try!<br />
<br />
David<br />
Wed, 19 Dec 2012 17:19:47 +000033576.1355937587.92655Cement flowing around funky 3D shape and displacing mud
http://www.comsol.com/community/forums/general/thread/33576/#p92224
Hi, I have an interesting fluids problem. 3D object in a snug fit inside a water filled tube. Pump heavy cement in one end, will it displace all of the water as it flows around the object or leave some trapped fluid.<br />
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Any recomendations on a CFD module to use?<br />
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Regards, JohnWed, 12 Dec 2012 17:22:56 +000033576.1355332976.92224