Influence of Surface Temperature on The Hydrodynamic Characteristics for Flow over Rotational Cylinder
DOI:
https://doi.org/10.38032/scse.2025.3.160Keywords:
Velocity Ratio, Reynolds Number, Lift Coefficient, Drag Coefficient, VortexAbstract
Turbulent flow over a rotational cylinder produces lift due to pressure differences on the upper and lower surfaces. The present numerical analysis focuses on the effect of the rotating cylinder's surface temperature. Simulations are carried out at the Reynolds number of 5000 for a series of velocity ratios ( 0 to 5). The surface temperature varied from 300 K to 500 K. A temperature-variable viscous model is used for the simulations as fluid viscosity depends on temperature. Results from the simulation show that the increased surface temperature of the cylinder for the velocity ratio below 3 slightly improves the lift coefficient. However, for higher velocity ratios (4 to 5), a significant improvement in the lift coefficient is found. In the case of the drag coefficient, however, values increase infinitesimally. The flow streamlines are around the cylinder, and the stagnation point is attached to the cylinder surface for 3. On the other hand, the streamlines fold around the cylinder, creating an Envelope Vortex at .
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Copyright (c) 2025 Sayedul Islam, Abdullah Al-Faruk (Author)
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