Abstract
Improving the hydrodynamic characteristics of STHECs (Shell-and-Tube Heat Exchanger Channels) by using BVGs (Baffle-type Vortex Generators) is among the common passive methods due to their proved efficiency. In this computational investigation, the same method is used to enhance the hydrodynamic behavior of STHECs, by inserting W-shaped Baffle-type Vortex Generators. The numerical model represented by the computational FVM (Finite Volume Method) is used to simulate and analyzed the considered physical model. The fluid used is air, its thermal physical properties are constant, turbulent, incompressible, and its temperature is 300 K at the inlet section of the STHEC. The flow velocity ( Uin ) and atmospheric pressure ( Patm ) are considered as boundary conditions at the entrance (x = 0) and exit (x = L) of the channel, respectively. The results showed that the friction coefficients were related to the pressure, velocity, and Reynolds number values. High values of Re yielded an acceleration of the fluid, resulting thus in increased pressure on the solid walls and augmented friction values.
Highlights
Several hydrothermal configurations have been proposed and studied by many authors to single out an optimized structure for improving the energy performance of various thermal devices such as the solar heaters and Heat Exchangers
The results showed that the friction coefficients were related to the pressure, velocity, and Reynolds number values
Using inclined solid and perforated type baffles, Dutta and Hossain [2] experimentally investigated the local characteristics of heat transfer as well as the profiles of skin friction coefficients inside a channel of rectangular form
Summary
Using numerical and experimental methods, Ary et al [1] studied the hydrothermal characteristics of inclined and perforated type baffles in a rectangular section channel. Using inclined solid and perforated type baffles, Dutta and Hossain [2] experimentally investigated the local characteristics of heat transfer as well as the profiles of skin friction coefficients inside a channel of rectangular form. In this experiment, two baffles with similar overall size were reported to increase the heat transfer. Using a three-dimensional numerical model, Promvonge et al [6]
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