Node33 - CFD SUPPORT

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OpenFOAM wmake Directory

OpenFOAM uses a special make command: wmake.
wmake understands the file structure in OpenFOAM and has some default compiler directives that are set in the wmake directory.
There is also a command, wclean, that cleans up the output from the wmake command.
If you add a new compiler name in the bashrc file, you should also tell wmake how to interpret that name.
In wmake/rules you find the default settings for the available compilers.
You can also find a few scripts that are useful when organizing your files for compilation, or for cleaning up.

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Pump Tutorial, blade pressure, slice 50% blade height

Figure: Turbo Blade Post; Pump Tutorial; The unwrapped mesh – a wheel region. Colored by pressure; OpenFOAM Water Turbine CFD

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Next: Uniform Fixed Value – Up: Inlet Boundary Conditions Previous: k varying with height Contents Index

Boundary Conditions for Specific Dissipation Rate of TKE – $\color{white} \omega$

Subsections

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Component interface alignment

Each component has to be connected to at least one neighboring component. The corresponding interfaces, i.e., the inlet or outlet boundaries, have to be perfectly aligned to each other:

the outlet boundary of the inlet pipe component has to be perfectly aligned with the inlet boundary of the rotor component.
the outlet boundary of the rotor component has to be perfectly aligned with the inlet boundary of the volute component
etc.
In case of periodic segments: The corresponding interfaces of full wheel geometry (built from periodic segment interfaces) must be perfectly aligned.

See the Figures below:

INPUT RULE 5: Each component has to be perfectly aligned with its neighbor(s).

Another example of inlet-outlet interface alignment is depicted below. We can see the interface of the rotor and volute component. The rotor outlet (red) is perfectly aligned with the volute inlet (green). The orange color depicts a wall part of the volute component.

A usual mistake is to extended the green part to the whole orange cylindrical part. In this case the red part would be not perfectly aligned with the volute inlet which is not allowed.

TCFD $\textregistered$ offers to impose so called mixing plane approach for components which defines just a segment of a full wheel geometry. In this case, neighboring interfaces have to be perfectly aligned in sense of its full wheel geometry, as depicted below.

Previous: Physical boundaries Up: Thinking in components Next: Watertight property

OpenFOAM Training by CFD Support, CFD SUPPORT, info@cfdsupport.com +420 212 243 883 © CFD support, s.r.o., Sokolovská 270/201, 190 00 Praha 9, Czech Republic