[gshankarau]

Hi,
Can any one guide me how to calculate hydraulic diameter for external flow problem for my domain dimensions are ( 550mm *550mm*2200mm ) (W*B*L)
respectively. and in fluent what factor must be the best one to choose in reference values and solution controls (ex compute from, inlet, outlet, all zones) which factor is the best one and how much value is set in outlet for back flow intensity in % Please suggest me good solution to solve this problem easily.

Thank you I am looking forward.