Sliding boundary conditions are specific to displacement fields: they use a mixture of DCT2 and DST2 boundaries, with the DST2 dimension being different in each channel.
Here's an example in 3D:
Channel [0] = displacement along X --> bound = (DST2, DCT2, DCT2)
Channel [1] = displacement along Y --> bound = (DCT2, DST2, DCT2)
Channel [2] = displacement along Z --> bound = (DCT2, DCT2, DST2)
Sliding boundary conditions are specific to displacement fields: they use a mixture of DCT2 and DST2 boundaries, with the DST2 dimension being different in each channel.
Here's an example in 3D:
They must be implemented in
pushpull_common.cpp, in different flavours: