|April 28, 2014, 03:10||
air flow impinge on a hot cylinder
Join Date: Mar 2013
Posts: 2Rep Power: 0
I have a problem with a simulation. The flow configuration is as follows:
An air flow ( T = 298 K) impinge on a moving cylinder (T = 1873 K; u = 7 m/s). The boundaries around are no walls but rather open atmosphere. The aim is to detect a possible buoyancy flow because of the temperature differences. The air at the calculation area has a temperature about 323 K.
The solvers I chose are "rhoPimpleFoam" and "buoyantPimpleFoam".
First question: Are these the right solver or is there another better one?
The main problem affects the boundaries (to the atmosphere). I chose it as follows:
type fixedValue; // OR type calculated;
value $internalField; // internalField is about 1e5
value uniform 1e5;
value uniform 323;
inletValue uniform 323;
value uniform (0 0 0);
I think I did a mistake because I get a temperature lower than 273 at the internalField.
Second question: Are the boundaries correct?
In the "thermophysicalProperties" I chose
Is this correct for this type of flow?
I use OpenFoam 2.3.x
I hope somebody can help me.
|April 28, 2014, 09:30||
Join Date: May 2013
Posts: 77Rep Power: 5
I'm almost 100% positive buoyantPimpleFoam is the best for this. For the pressure I think you need
because p_rgh calculates pressure in the hotRoom example.
You would also need to setup probes (an example can be found in the TJunction tutorial in the controlDict file).
That's all I know.
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