The Nusselt Number for the Compressible Laminar Fluid Flow in the Entrance Zone of a Hot Tube

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Abolpour Bahador; Shamsoddini Rahim

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Journal Paper

Paper Information

Journal: FLUID MECHANICS AND AERODYNAMICS JOURNAL Year:2022 | Volume:30 | Issue:2 Page(s): 1-9

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Information Journal Paper

Title

The Nusselt Number for the Compressible Laminar Fluid Flow in the Entrance Zone of a Hot Tube

Author(s)

Abolpour Bahador | Shamsoddini Rahim | Issue Writer Certificate

Keywords

Nusselt number

Compressible flow

Laminar flow

Entrance zone

Hot tube

Abstract

Solving many important industrial problems requires knowing the values of the heat transfer coefficient of passing of one or more fluid streams in different equipment, systems or pipes. In the present study, a numerical model has been developed to simulate compressible fluid flow at the inlet of a hot pipe with different angles to the horizon. In this zone, the hydrodynamic and thermal boundary layers of the fluid flow are developing. Due to the turbulence of the fluid flow due to the interaction of heat and fluid flow inside this tube, a three-dimensional turbulent model was used for this simulation. For this purpose, continuity and compressible Navier-Stokes equations, Reynolds stress model, and turbulent and compressible energy equation have been solved simultaneously. Then, using a set of numerical runs by the concepts of experimental design and optimization methods, a predictive formula for the Nusselt number for these flows has been obtained. Finally, the ability of this formula has been investigated using a set of laboratory data.

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