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The present study investigates the heat transfer and fluid flow characteristics numerically as well as experimentally in a rectangular duct with pulsating velocity at the inlet. The numerical analysis is carried out using Finite Element Method (FEM) using k-ω turbulence model. Air (Pr = 0.71) is used as working fluid and is assumed to be incompressible and inviscid. The experimental setup features a test section that is 130 cm long with an aspect ratio of 1.2. During the experiments, the Reynolds number of the working fluid is adjusted to span from 12,800 to 35,000. Additionally, the pulsation frequency of the fluid is varied, ranging from 0 to 60.5 Hz. The experimental and simulation results depict enhancement of heat transfer. A maximum heat transfer augmentation of 19.5% is observed at a Reynolds Number of 29,000 and at a frequency of 15.5 Hz. The local Nusselt Number downstream of the duct first increases and then decreases at the end of the heated plate.

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Experimental and Numerical Investigation of Heat Transfer and Fluid Flow Through a Rectangular Duct with Pulsating Flow

  • 会议论文

  • 发表日期：

    2026年

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  • Mohammad Kamran,
  • Amir Yousf Sofi,
  • Adnan Qayoum

摘要

The present study investigates the heat transfer and fluid flow characteristics numerically as well as experimentally in a rectangular duct with pulsating velocity at the inlet. The numerical analysis is carried out using Finite Element Method (FEM) using k-ω turbulence model. Air (Pr = 0.71) is used as working fluid and is assumed to be incompressible and inviscid. The experimental setup features a test section that is 130 cm long with an aspect ratio of 1.2. During the experiments, the Reynolds number of the working fluid is adjusted to span from 12,800 to 35,000. Additionally, the pulsation frequency of the fluid is varied, ranging from 0 to 60.5 Hz. The experimental and simulation results depict enhancement of heat transfer. A maximum heat transfer augmentation of 19.5% is observed at a Reynolds Number of 29,000 and at a frequency of 15.5 Hz. The local Nusselt Number downstream of the duct first increases and then decreases at the end of the heated plate.