{"id":166477,"date":"2022-02-17T02:18:43","date_gmt":"2022-02-17T02:18:43","guid":{"rendered":"\/forum\/forums\/topic\/high-temperature-shoot-up-and-high-mach-flow\/"},"modified":"2022-02-18T19:25:51","modified_gmt":"2022-02-18T19:25:51","slug":"high-temperature-shoot-up-and-high-mach-flow","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/high-temperature-shoot-up-and-high-mach-flow\/","title":{"rendered":"high Temperature shoot up and high mach flow."},"content":{"rendered":"
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Dear Friend,<\/p>\n

I was solving the airflow through the Tangle, in order to solve the problem, I choose the flowing fluid as "air" as compressible fluid. I am doing this as a control experiment. Pinlet (Gauge Pressure) :3 atm and Pout(Gauge Pressure) is 1atm. The temperature of the fluid is 300K (constant for inlet and outlet) . <\/p>\n

Solver: Explicit, ROE and Grad: Node-based and Flow: Second upwind scheme. <\/p>\n

Initialization: Hybrid <\/p>\n

Steady-state problem: <\/p>\n

Gravity: Y-axis :-9.81 <\/p>\n

Mach flow: Vel\/Sqrt(1.4*287*Totat Temp) and Courant Number:1 and <\/p>\n

I am not sure, why I am getting such a high temperature and Impossible Mach number through the T-channel. This result in the CFD post doesn't make any sense. I am not sure where I am making mistakes in defining the BC or meshing issue., solver, or anything else. Do I need to put any operating pressure, if I am just simulating for the flow at atmospheric conditions? any suggestion will be helpful. <\/p>\n

Error shown by TUI for every iteration: Solver: " time step reduced in 707 cells due to excessive temperature change<\/p>\n

 temperature limited to 1.000000e+00 in 729 cells on zone 3 <\/p>\n

 temperature limited to 5.000000e+03 in 961 cells on zone 3 <\/p>\n

  200 1.8851e+00 5.7939e-01 8.1209e-01 7.1154e-01 8.3318e-01 0:00:00  0 "<\/p>\n

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