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2d Axisymmetric Pressure-Swirl Atomizer Floating Point Error |
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October 18, 2021, 16:39 |
2d Axisymmetric Pressure-Swirl Atomizer Floating Point Error
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New Member
Matthew
Join Date: Oct 2021
Posts: 2
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Hello,
I am currently attempting to simulate a pressure-swirl atomizer. I am using a simplified 2D axisymmetric model with the 'Axisymmetric Swirl' model included to simulate the swirling flow. I have calculated the radial and tangential velocities required of an equivalent annunar inlet to the flow through conservation of mass and angular momentum, and I am confident that I have these values correct. My issue is that the swirling flow causes my residuals to diverge and eventually reach a floating point error, of which it says the specific cause cannot be identified. This was initially the case when I was modelling the full multiphase flow with the implicit unsteady solver. I thought it may have been a meshing or time step issue, but I was unable to solve it that way. I have also tried to use just water as the fluid in both implicit unsteady and steady state but even then the results diverge and eventually crash regardless of models, mesh, or time steps. I have tried to follow all advice on other problems suffering from floating point error's but I believe mine is directly relating to the swirl and I have not been able to find any advice on this matter. Here is a google drive link to a steady-state attempt at simulating this swirl: https://drive.google.com/file/d/1gJT...ew?usp=sharing If anyone could offer any assistance it would be greatly appreciated. Thanks, Matthew |
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Tags |
axisymmetric swirl, floating point error, star ccm+ |
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