[xq712000]

It seems Pointwise CAE solver doesn't support generic BCs as Gridgen ???

How to export "Analysis BCs" in Pointwise (as Gridgen does) ???

[dgarlisch]

XieQing,

As you discovered, Pointwise uses a different approach for BCs than Gridgen. However, the Pointwise approach is much more flexible.

In Pointwise, you can create as many named BCs as you want. Basically, every BC you create in Pointwise is equivalent to a generic BC in Gridgen.

The basic steps to using BCs in Pointwise are:

1. Create/load your grid.
2. Set your CAE solver using the CAE/Select Solver... menu.
3. Open the BC panel using the CAE/Set Boundary Conditions... menu.
4. Create one or more BCs. You can edit it's name and type.
5. Apply the BCs you created to the appropriate boundary domains in your grid.
6. Exit the BC panel.
7. Export your grid using the File/Export/CAE... menu.

This CFDMeshing video may help.

Bonus: The steps above also apply to using VCs in Pointwise!

[xq712000]

Originally Posted by dgarlisch

XieQing,

As you discovered, Pointwise uses a different approach for BCs than Gridgen. However, the Pointwise approach is much more flexible.

In Pointwise, you can create as many named BCs as you want. Basically, every BC you create in Pointwise is equivalent to a generic BC in Gridgen.

The basic steps to using BCs in Pointwise are:

1. Create/load your grid.
2. Set your CAE solver using the CAE/Select Solver... menu.
3. Open the BC panel using the CAE/Set Boundary Conditions... menu.
4. Create one or more BCs. You can edit it's name and type.
5. Apply the BCs you created to the appropriate boundary domains in your grid.
6. Exit the BC panel.
7. Export your grid using the File/Export/CAE... menu.

This CFDMeshing video may help.

Bonus: The steps above also apply to using VCs in Pointwise!

Excuse me, the problem wasn't well described.......OTZ

In Gridgen

the "Export Anlaysis BCs" button creats a generic BCs' information file( IF the Solver is Generic )

The file has such FORMAT as:

write flow_solver_id

write number_of_blocks

do number_of_blocks

write block_imax, block_jmax,(and block_kmax if 3D), block_name
c........a region is a boundary condition or interblock connection

write number_of_regions_on_block

do number_of_regions_on_block
write source_region_imin, source_region_imax,source_region_jmin, source_region_jmax,(and source_region_kmin, source_region_kmax if 3D),bc_number

if region is a connection (bc_number<0) then

c..............For an interblock connection, there are three
c..............pairs of indices that must be matched (three on
c..............the source face and three on the target face).
c..............The index that's constant on both the source and
c..............target faces is easy to determine simply by
c..............comparing the min and max indices and finding the
c..............pair in which min and max are the same.
c..............On each of the source and target faces, Gridgen
c..............writes one of the two remaining min-max index
c..............combinations as negative numbers. The negative
c..............min-max pair on each face correspond. Once you
c..............determine the corresponding negative indices
c..............just convert them to positive numbers.
c..............That leaves one pair of indices that align.
c..............Keep in mind that the max index may actually
c..............be less than the min index. You can either use
c..............a negative increment to step through the index
c..............or you can swap the min and max indices on BOTH
c..............source and the matching target indices.

write target_region_imin, target_region_imax,target_region_jmin, target_region_jmax,(and target_region_kmin, target_region_kmax if 3D), target_block_number
endif

end do number_of_regions_on_block

end do number_of_blocks



My question is how can I directly output such file in Pointwise ?

[xq712000]

It seems Pointwise doesn't support a SOLVER called "Generic" ???

which is actually PLOT3D formatted

[dgarlisch]

XieQing is correct.

Pointwise does not support the generic exporter available in Gridgen. However, adding a generic CAE exporter is on our short list of enhancements. Barring any technical difficulties, we expect it to be finished this summer.

In the meantime, you can probably just export as Plot3D. As XieQing said, the Gridgen generic format uses Plot3D for the grid data and also creates a BC file.

If you want even more control, you should consider writing your own CAE exporter using the Pointwise CAE Plugin SDK.