Hello everyone,<\/p>\n
I’m currently conducting a simulation regarding a geometry where air enters a large tank through a small nozzle and then exits through a outlet hole.<\/p>\n
Due to the high velocity of the incoming air and the small size of the inlet nozzle, the phenomenon under study cannot be described using incompressible gas models. Indeed, with such models, I was only able to achieve good agreement with my experimental data at low flow rates. However, at progressively higher flow rates with an incompressible gas model, I significantly underestimate the results in term of pressure losses.<\/p>\n
However, when switching to describing the air as an ideal gas, I am facing some difficulties in achieving convergence in my analysis.<\/p>\n
Currently, I am using the pressure-based solver, Coupled Scheme, and k-epsilon RNG turbulence model. Additionally, the preliminary results I am obtaining show significantly higher pressure losses compared to those recorded experimentally, with Mach numbers close to 1.<\/p>\n
Do you have any suggestions on how to approach this problem? Should I reconsider some of my assumptions to better describe the behavior of air at these flow regimes?<\/p>\n
Thank you all in advance.<\/p>\n","protected":false},"template":"","class_list":["post-363751","topic","type-topic","status-closed","hentry","topic-tag-compressible-flow-air-2","topic-tag-convergence-issues-1","topic-tag-nozzle"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t