fluread

Mapdl.fluread(fname='', ext='', kdim='', kout='', limit='', listopt='', **kwargs)

Reads one-way Fluent-to-Mechanical APDL coupling data via a .cgns file

APDL Command: FLUREAD with one-side fast Fourier transformation complex pressure peak value.

Parameters:

–

Reserved.

fname

File name and directory path of a one-way Fluent-to-Mechanical APDL coupling data file (248 characters maximum, including the characters needed for the directory path). An unspecified directory path defaults to the working directory; in this case, you can use all 248 characters for the file name. Defaults to jobname.

ext

File name extension of the one-way Fluent-to-Mechanical APDL coupling data file. Defaults to .cgns).

kdim

Interpolation data for mapping. A value of 0 (default) or 2 applies 2-D interpolation (where interpolation occurs on a surface).

kout

Outside region results for mapping:

0 - Use the value(s) of the nearest region point for points outside of the region.

This behavior is the default.

1 - Set results extrapolated outside of the region to zero.

limit

Number of nearby nodes considered for mapping interpolation. Minimum = 5. Default = 20.

listopt

Type of items picked:

(blank) - No listing (default).

SOURCE - List the node coordinates and complex pressure values on the Fluent source side

during the solution.

TARGET - List the node coordinates and complex pressure values on the mapped Mechanical

APDL target side during the solution.

BOTH - List the node coordinates and complex pressure values on both the Fluent source

side and the mapped Mechanical APDL target side during the solution.

Notes

The FLUREAD command reads one-way Fluent-to-Mechanical APDL coupling data from a .cgns file. The Fluent one-side fast Fourier transformation (FFT) peak complex pressure values are mapped to the Mechanical APDL structure model during the acoustic-structural solution at each FFT frequency.

The command can be used only for the model with the acoustic elements.

To apply complex pressure to the structure model, define the SURF154 surface element, then define the one-way coupling interface (SF,,FSIN) on the element.

You can define the solving frequency range via the HARFRQ command. The solver selects the FFT frequencies between the beginning and ending frequencies. The number of substeps is determined by the number of FFT frequencies over the frequency range. The number of substeps defined via the NSUBST command is overwritten.

For better mapping performance, consider the following:

Calculations for out-of-bound points require much more processing time than do points that are within bounds.

For each point in the structural destination mesh, the command searches all possible triangles in the Fluent source mesh to find the best triangle containing each point, then performs a linear interpolation inside this triangle. For faster and more accurate results, consider your interpolation method and search criteria carefully. (See LIMIT.)

It is possible to apply one-way coupling excitation to multiple frequencies. The one-side FFT peak complex pressure values are necessary to do so.