|April 12, 2016, 21:07||
Turbulence model, time step for a solar reactor simulation
Krishna Sandeep Prata
Join Date: Jan 2015
Posts: 10Rep Power: 3
I am simulating the fluid flow inside a solar reactor. The reactor has two inlets and two outlets. The inlets and outlets are circular pipes that open into vertical rectangular channels (please see the attached picture). I am not modeling the pipes and my domain starts/ends at the intersection of the circular pipe with the vertical channel. The computational domain contains a porous cylinder (As seen by the solid blue color) and non porous fluid domains too. The physical problem that I am solving can be described as follows. The entire reactor is initially filled with static air at room temperature and atmospheric pressure. At t>0, Nitrogen and CO2 flow into the reactor from their respective inlets, establish a fluid field and go through the outlets. So, as time progresses, initial air gets displaced. So, the steady state of the reactor (if exists) should not have air. Here are a few questions that I have -
2) I used a steady state simulation but could not reach desired accuracy with respect to the species balance. So, I am now switching to transient case. How should I decide the over the time step and the maximum number of iterations per time step?
Any help in this regard is highly appreciated. I know I have not provided many details but I will post details as you ask.
|mesh, species accuracy, time stepping, turbulence|
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