<![CDATA[This study analyzes the effect of the nozzle and diffuser on airflow distribution in an open-circuit wind tunnel using Computational Fluid Dynamics simulation. The model was created in Autodesk Inventor and simulated in Autodesk CFD at an airflow velocity of 6 m/s, under steady-state conditions, using the k-ε turbulence model. The simulation stages included model development, meshing, boundary condition setup, and post-processing. The simulation results show that the maximum velocity at the nozzle reached 5.3 m/s, increased to 21,08 m/s at the test section, then decreased to 19,17 m/s at the diffuser, with static pressure gradually increasing from 101.150 Pa at the nozzle to 101.297 Pa at the diffuser, indicating a pressure recovery process consistent with the diffuser function. This study's novelty lies in the stepwise quantitative analysis of velocity and pressure distributions at each segment of a laboratory-scale open-circuit wind tunnel using Autodesk CFD simulation, supported by a mesh-independence test, which has not been widely reported in similar previous studies.]]>
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