[Pw_forum] Van der Waals

[Adriano Mosca Conte]

I have two questions about the calculations with VdW forces
(input_dft       = 'vdW-DF'):
1- Is it possible to perform VdW calculations with any kind of functional?
Or is it mandatory to use revPBE?
2- I generated a VdW table on two different machines (sp6 of CINECA,
matrix of  CASPUR). I got different numbers in the files vdW_kernel_table
(sign
and order of magnitude are different in many cases). Could it depend on the
modules I loaded on matrix? Which are the libraries used to generate
the table?
Adriano


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