July 9, 2020 at 4:28 amDaichaSubscriber
In my simulation, I would like set convection heat boundary condition at wall boundary (2D simulation)
So, heat flux at boundary can be expressed as following equation.
where q : heat flux from wall to fluid [w/m2], h: Convection Heat Transfer coefficient [W/m2 K], T(outside): Wall temperature, [K]
T (fluid): Fluid cell temperature next to wall [k]
According to fluent user's guide, this setting can be set at fluent's (boundary condition→ thermal→convection boundary condition)
So i did this setting However, the amount of heat flux was lower than I imagined.
So my questions are
1. Are any problems in terms of heat flux caused if i simulate under 2D, cylinder symmetry, millimeter, condition ?
2. In the setting page of convection boundary condition, we can set heat generation rate [W/m3]. How is this value used for heat flux calculation ? (If possible, I would like you to indicate the specific equation )
July 9, 2020 at 5:33 amDrAmineAnsys Employee
1/Should work: if 2D think about the reference depth you need to adjust to get the heat flux (W)
2/That is another thing and you can think about it as a volumetric source for the wall which now requires a finite thickness
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