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liquid-gas ejector

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Old   April 10, 2017, 21:39
Default liquid-gas ejector
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Hi everyone!

I am doing a liquid-gas ejector simulation. The primary purpose of this simulation is to create vacuum about 96000 Pa.

I followed a two-phase flow where water is the primary fluid and air is the entrained fluid. I set water as constant and air as ideal gas. their interaction have drag factor assumed as symmetric and lift a followed manninen et al.

The solver is pressure-based with pressure velocity coupling using SIMPLEC. all parameters are set as second order upwind except for volume fraction which is QUICK (from literatures).

The grid quality is 0.92 (min orthogonality) with 1.3M nodes.

I have two inlets. one is a velocity inlet at 75 m/s for water and another one is the pressure inlet (suction inlet) at -96000 Pa for air. The pressure outlet is set atmospheric.

I have no UDF files uploaded.

My problem is that the simulation doesn't converge nor it diverged.

Although those assumptions i used was from a gas-liquid ejector and mine is a liquid-gas ejector.

Please help.
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