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August 14, 2013, 08:38 |
need help solving an aerofoil
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New Member
TPRPR1
Join Date: Apr 2013
Posts: 13
Rep Power: 12 |
hi
i am new to cfd .i wrote a journal file to solve for several angles of attack(-6.5 to 16.5) using SA model in fluent 14.i got the solution for some angles but it oscillates for other angles.Re is 7e^6 and wall spacing is 3e^-6.(10000m altitude ) wall y plus is lesser than 1. the first part of the below code solves for -6.5 but it does not solve for -2.5(second part) ;-6.5 /mesh/reorder reorder-domain /define/models energy yes yes yes /define/models/viscous spalart yes /define/models/viscous sa-alternate-prod yes /define/materials change air air yes ideal-gas no no yes sutherland three-coefficient-method 0.00001458 273.11 110.56 no no no /define/operating-conditions operating-pressure 26500 define/boundary-conditions/pressure-far-field farfield no 0 no 0.85 no 223.1 no 0.99357185567 no -0.11320321376 no no yes no 10 /solve/monitors/force set-lift-monitor cl-1 yes crvs () yes yes cl-1-history yes 2 no 0.11320321376 0.99357185567 /solve/monitors/force set-drag-monitor cd-1 yes crvs () yes yes cd-1-history yes 3 no 0.99357185567 -0.11320321376 /solve/monitors/force set-moment-monitor cm-1 yes crvs () yes yes cm-1-history yes 4 no 0.25 0 0 0 -1 /solve/initialize/compute-defaults pressure farfield q /solve/initialize/initialize-flow ok /report/reference-values/compute pressure-far-field farfield /solve/initialize fmg yes /solve iterate 3000 -2.5 define/boundary-conditions/pressure-far-field farfield no 0 no 0.85 no 223.1 no 0.99904822158 no -0.04361938736 no no yes no 10 ;setting lift and drag monitors /solve/monitors/force delete "cd-1" yes /solve/monitors/force delete "cl-1" yes /solve/monitors/force delete "cm-1" yes /solve/monitors/force set-lift-monitor cl-3 yes crvs () yes yes cl-3-history yes 2 no 0.04361938736 0.99904822158 /solve/monitors/force set-drag-monitor cd-3 yes crvs () yes yes cd-3-history yes 3 no 0.99904822158 -0.04361938736 /solve/monitors/force set-moment-monitor cm-3 yes crvs () yes yes cm-3-history yes 4 no 0.25 0 0 0 -1 ;solution initialization /solve/initialize/compute-defaults pressure farfield q /solve/initialize/initialize-flow ok ;setting up reference values /report/reference-values/compute pressure-far-field farfield /solve/initialize fmg yes /solve iterate 3000 |
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