Simulation of Non-Isothermal Turbulent Flows Through Circular Rings of Steel

Abstract

This article is intended to examine the fluid flow patterns and heat transfer in a rectangular channel embedded with three semi-circular cylinders comprised of steel at the boundaries. Such an organization is used to generate the heat exchangers with tube and shell because of the production of more turbulence due to zigzag path which is in favor of rapid heat transformation. Because of little maintenance, the heat exchanger of such type is extensively used. Here, we generate simulation of flow and heat transfer using nonisothermal flow interface in the Comsol multiphysics 5.4 which executes the Reynolds averaged Navier stokes equation (RANS) model of the turbulent flow together with heat equation. Simulation is tested with Prandtl number (Pr = 0.7) with inlet velocity magnitude in the range from 1 to 2 m/sec which generates the Reynolds number in the range of 2.2 × 10 5 to 4.4 × 10 5 with turbulence kinetic energy and the dissipation rate in ranges (3.75 × 10 −3 to 1.5 × 10 −2 ) and (3.73 × 10 −3 −3 × 10 −2 ) respectively. Two correlations available in the literature are used in order to check validity. The results are displayed through streamlines, surface plots, contour plots, isothermal lines, and graphs. It is concluded that by retaining such an arrangement a quick distribution of the temperature over the domain can be seen and also the velocity magnitude is increasing from 333.15% to a maximum of 514%. The temperature at the middle shows the consistency in value but declines immediately at the end. This process becomes faster with the decrease in inlet velocity magnitude.

Aggregation Effects on Entropy Generation Analysis for Nanofluid Flow over a Wedge with Thermal Radiation: A Numerical Investigation

“…The threedimensional nanofluid flow model with the use for solar energy was explored by Ahmad Khan et al [17]. Some recent demonstration on flow in circular rings and circular cylinder can be seen in [18,19].…”

Computational fluid dynamics-based investigation of the static and dynamic characteristic of hydrostatic bearing with nanolubricant: A theoretical method

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