Reply To: Simulation of a jet of air into a shock tube

[bmarjaba]

i see, okay. i'll try that as well. nso i ran it with the following settings yesterday: Coupled scheme, Flow Courant Number =1 in solution controls, fixed time step method, time step = 1e-06. nthe residuals looked good to me, where each equation dropped a minimum of 1e-03 for each time step and the solution was converging, and i ran it over night. i came back today morning and found that it has crashed. the contours and the residuals look good to me before and after it crashed, i monitored the net mass flow rate throughout and it hovered around a number really close to 0 even after it crashed. this was the error message:nReversed flow on 1384 faces (31.9% area) of pressure-outlet 8.n!44051 solution is convergedn 44051 5.5133e-08 4.5500e-08 6.2184e-08 1.0478e-07 2.7427e-10 5.8664e-10 7.6547e-10 0:00:11 6n step flow-time mass-flow-ra flow-timen 2662 2.6620e-03 1.0639e-04 2.6620e-03nFlow time = 0.002662s, time step = 2662nRegistering ReportDefFiles, (C:\Users\bmarjaba\Documents\Turbulent Jet_files\dp0\FFF-1\Fluent\.\report-file-0.out C:\Users\bmarjaba\Documents\Turbulent Jet_files\dp0\FFF-1\Fluent\.\mass-flow-rate-rfile.out C:\Users\bmarjaba\Documents\Turbulent Jet_files\dp0\FFF-1\Fluent\.\inlet-pressure-rfile.out)nCan't figure which cell particle is going to -- ABORTnCannot find intersecting face for particle 2416 step 193 -- ABORT at (2.889059e-02 6.984949e-02 1.537980e-01) in cell 114868 , t-id 4, next_pos = (2.889059e-02 6.984949e-02 1.537980e-01)nCan't figure which cell particle is going to -- ABORTnCannot find intersecting face for particle 2306 step 164 -- ABORT at (2.888347e-02 6.984949e-02 1.537913e-01) in cell 114868 , t-id 4, next_pos = (2.888347e-02 6.984949e-02 1.537913e-01)n........n........n........nCan't figure which cell particle is going to -- ABORTnCannot find intersecting face for particle 5588 step 192 -- ABORT at (2.663768e-02 6.984948e-02 1.560050e-01) in cell 114729 , t-id 4, next_pos = (2.663768e-02 6.984948e-02 1.560050e-01)nCan't figure which cell particle is going to -- ABORTnCannot find intersecting face for particle 6337 step 399 -- ABORT at (2.344654e-02 6.984946e-02 1.490714e-01) in cell 119545 , t-id 4, next_pos = (2.344654e-02 6.984946e-02 1.490714e-01)nnumber tracked = 60687, escaped = 24068, aborted = 71, incomplete = 36606nWriting data to C:\Users\bmarjaba\Documents\Turbulent Jet_files\dp0\FFF-1\Fluent\FFF-1.ip ...ntx-coordnty-coordntz-coordntpressurentx-velocitynty-velocityntz-velocitynttemperaturentkntomeganDone.nnCalculation complete.