Tank with Safety Valve
buoyantPimpleFoam, activePressureForceBaffleVelocity, meshing, topoSet, createPatch, createBaffle, function1, gap refinement, externalWallHeatFluxTemperature
Sponsored by the continuous support of «Andreas Mai» and hence, dedicated to «Andreas Mai»
The boundary condition named activePressureForceBaffleVelocity is a combination of a wall-type and cyclic-type patch. Therefore, we are able to model a kind of safety valve or rupture disc which can either close or open (only once). The combination of the wall-type and cyclic-type conditions does need special focus on the mesh generation. The goal of this tutorial is to demonstrate the usage of the activePressureForceBaffleVelocity mainly in terms of setting up the case / creating the mesh by using snappyHexMesh, topoSet, createBaffle, and createPatch.
Note: The boundary condition «activePressureForceBaffleVelocity» does contain a potential bug which opens the baffle after twice the user-defined threshold. See here for more information and possible merge to the code: Issue 2360.
The activePressureForceBaffleVelocity combines the wall-type and cyclic-type patch
The presented training case models a vessel that is headed at the bottom by using the boundary condition externalWallHeatFluxTemperature while applying a function1 table for the power supply. The safety valve, modeled by using the activePressureForceBaffleVelocity, will open after a defined pressure difference between the tank and the atmosphere is reached. After that, the valve opens based on the given parameters (fraction/opening-time). Hence, the wall-type condition switches to a cyclic-type patch which allows the release of the pressure tank. Thread at cfd-online.com.
Published under the GNU General Public License 3
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