COMSOL 6.4 - Transient Mapping

) study is a dedicated study to use when the Aeroacoustic Flow Source Coupling couples a DES, LES, or RANS-EMV SST-SAS Fluid Flow interface, or the The Imported Fluid Flow Interface, with the Aeroacoustic Flow Source in pressure acoustics. The study uses a tailored solver. Together with the multiphysics coupling, the study handles the mapping of flow source variables (the Lighthill stress tensor) between the fluid flow mesh or data and the acoustics mesh for consistent simulation results.

Physics and Variable Selection

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If coupling aeroacoustics to The Imported Fluid Flow Interface, then select both the Aeroacoustic Flow Source Coupling and the Imported Fluid Flow physics as being .

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If coupling aeroacoustics to a Fluid Flow interface, then only select the Aeroacoustic Flow Source Coupling as being . No other physics will be solved by the mapping study.

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If only importing stationary CGNS data using The Imported Fluid Flow Interface, then select only the Imported Fluid Flow physics as being .

Data to Map

From the list select:

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if coupling to the Imported Fluid Flow physics or only mapping using the Imported Fluid Flow, or

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select the study containing the coupled Fluid Flow physics interface to map.

Destination Mesh Selection

Select the destination/target mesh of the mapping, that is, the acoustics mesh used for the aeroacoustics simulation.


	Note that when the Transient Mapping is performed an extra time step (before the first time step to be mapped) is added to ensure a smooth mapping also for the first time step. If applicable, this solution can be disregarded in subsequent selections.