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Rotational fluid motion in a closed system with a diluted species
Posted Apr 24, 2017, 2:03 a.m. EDT 2 Replies
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Hello all,
I am convinced that this is a simple problem, but I am having difficulty in setting it up. Simply put, I have a cylinder, which has no inlets or outlets, and within it there needs to be fluid motion, which to start with is rotating at 30 RPM. Alongside this fluid motion, there is transport of diluted species physics in place, which will be affected by this fluid flow and hence, MUST BE COUPLED. I was wondering if anybody could provide a hint as to how I can achieve this?
I have fiddled around with the mixer module which includes options for inputting RPM, but I do not think this module can be coupled with my diluted species physics. That brings me to either laminar flow physics or turbulent mixing within the transport of diluted species physics, both of which ask for a velocity field, which I cannot seem to get right. Any tips would be GREATLY appreciated, I am about to tear out my hair!
David
I am convinced that this is a simple problem, but I am having difficulty in setting it up. Simply put, I have a cylinder, which has no inlets or outlets, and within it there needs to be fluid motion, which to start with is rotating at 30 RPM. Alongside this fluid motion, there is transport of diluted species physics in place, which will be affected by this fluid flow and hence, MUST BE COUPLED. I was wondering if anybody could provide a hint as to how I can achieve this?
I have fiddled around with the mixer module which includes options for inputting RPM, but I do not think this module can be coupled with my diluted species physics. That brings me to either laminar flow physics or turbulent mixing within the transport of diluted species physics, both of which ask for a velocity field, which I cannot seem to get right. Any tips would be GREATLY appreciated, I am about to tear out my hair!
David
2 Replies Last Post Apr 24, 2017, 8:27 a.m. EDT
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Posted:
8 years ago
Hi
in the CFD module, Single Phase Tutorials, rotating disk gives you the hints how to set up the rotational motion, just apply it within the cylinder. But if you have no inputs or outputs, what is the origin of mass transfer. A reaction in the cylinder?
BR
Lasse
in the CFD module, Single Phase Tutorials, rotating disk gives you the hints how to set up the rotational motion, just apply it within the cylinder. But if you have no inputs or outputs, what is the origin of mass transfer. A reaction in the cylinder?
BR
Lasse
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Posted:
8 years ago
Hello,
Yes, there is a reaction within the cylinder which produces the species at the centre, the bulk of the domain will be just fluid, water for the moment, and my hope is to see how much more quickly rotational fluid motion will lead to uniform concentration of the species within the fluid.
Thank you for posting,
David
Yes, there is a reaction within the cylinder which produces the species at the centre, the bulk of the domain will be just fluid, water for the moment, and my hope is to see how much more quickly rotational fluid motion will lead to uniform concentration of the species within the fluid.
Thank you for posting,
David