967 | 967 | Similar as 'multigrid', but less optimized. However, in contrast to 'multigrid', 'multigrid_noopt' allows [#masking_method masking_method]=.FALSE., i.e. setting of Neumann boundary conditions for the perturbation pressure at all wall boundaries. '''Please note,''' in combination with [#masking_method masking_method], the 'multigrid_noopt' solver can lead to a blow-up of wind velocity in case of narrow street canyons or complex shapes resolved by only a few grid points. Please see further [../../tec/bugs/#remark1 remarks].\\\\ |