Hello all,
If modelling a 2D case, for example, a rectangular box full of liquid, and defining a heat source cell zone along a thin line - I am trying to simulate an electron beam crossing a hydrogen target - that crosses from the left vertical wall the opposite one (i.e. the right vertical one, i.e., the heat source would cross the domain in an horizontal way), and wanting to study the natural convection produced due to the heat source, would that heat source cell zone permit mass flow through it?
With that I mean: will the cold liquid underneath the heat source "be able to go up" as it gets warmer, or would be that heat source like an actual "physical obstacle" for the fluid?
Thank you very much in advance!
The heat source should just add a term to your energy equation, it should not interfere with the continuity equation unless you also define those cells as a wall or some other physical obstacle to the flow. I've seen simulations, from a colleague, in ANSYS Fluent with a heat source added to a region to simulate the use of lasers to break shock waves in 2D hypersonic flow and the flow passes through them normally.
If you assume the heat source as isothermal, it wiil warm the cold fluid. Otherwise if you assume the source as thermally conductive, it wiil conduct the heat to pass through it.
Hi everyone, I have another question.
I am having trouble with the boundary-adapting process (Fluent). I want to refine every single "wall" of my domain (see attached image) using the boundary adapt tool.
The two marked "dummy walls" aren´t actually physicall walls. They just represent the boundaries of an heat source (an electron beam), beeing the rest of the walls of the domaing actual physical walls.
The problem arrises, when I try to refine the two marked "dummy walls". When defining them as "wall" in the ANSYS-Meshing, I get to refine them using "Adapt". But, after refining, when I try to change the type of those "dummy walls" to interior-Type in the "boundary conditions" part of the setup, I get following error:
"Unable to sew together the two walls due to hanging nodes.
You must first remove the hanging nodes of these face zones."
I suppose that I am getting that error, because the boundary-adapt refinement was thought for actual boundary layer refinement, that is, for physical walls but not for my case.
On the other hand, while defining those two "dummy walls" as "interior" in the ANSYS-Meshing, those "dummy walls" become part of the actual "interior"-cell zone.
You may be asking yourselfs, why I would want to refine that area. I just want a better detail of the heat transfer process between the electron beam and the fluid (thermal boundary layer).
I hope I made my problem understandable.
Thank you very much in advance for your help!
Have a nice day.
Bye.
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