Numerical Investigation of Effects of Ramification Length and Angle on Pressure Drop and Heat Transfer in a Ramified Microchannel

Abstract

The aim of this study is to investigate the effects of ramification length and angle on pressure drop and heat transfer in a ramified microchannel. The governing equations for the fluid flow were solved by using Fluent CFD code. Computational results were compared with mathematical model values given in the literature for validation. On the basis of a water-cooled (only water and water+ethanol) smooth microchannel, ramified plates were designed into the heat sink, and then the corresponding laminar flow and heat transfer were investigated numerically. Four different configurations of ramified plates were considered by adjusting the angle and length of the T profile. Results obtained from the numerical tests show good agreement with the mathematical model and these results also demonstrate that the pressure drop increases with increasing both the ramification length and angle. Moreover, the maximum temperature inside the ramified microchannel increases with increasing the ramification length as well as increasing the ratio volume fraction of ethanol.

Numerical Investigation of the Use of a New Nano-Particle in Microchannel

“…The steady-state conservation of mass, momentum and energy equations can be shown in the following compact form [5]:…”

“…Kaya [5] researched the effects of rami cation length and angle on pressure drop and heat transfer in a rami ed microchannel. Results derived from the numerical tests indicate that the pressure drop increases with increasing both the rami cation length and angle.…”

“…It is seen in many important applications, such as miniature heat exchangers, microscale process units, research nuclear reactors, materials processing and thin lm deposition technology, biotechnology system as well as in potential space application [2]. A lot of research has been done to improve thermal performance on micro systems in literature [3][4][5][6][7].…”

Effect of Reverting Channels on Heat Transfer Performance of Microchannels with Different Geometries

“…Ramiar et al (2012) numerically solved the conjugate heat transfer of a nanofluid in a 2D microchannel and investigated the effect of Reynolds number, nanoparticle conductivity. In another work, Kaya (2016) investigated the effects of ramification length and angle on pressure drop and heat transfer in a ramified microchannel. He showed that maximum temperature inside the ramified microchannel increases with increase of ramification length.…”

Influence of Transverse Magnetic Field on Microchannel Heat Sink Performance

“…Furthermore, a two-dimensional study was conducted by the researches; hence the results may not be the same for actual three-dimensional problems as the additional wall effects may play a vital role in determining the exact heat transfer enhancement due to additional pressure drop. Numerous other studies have also helped in the understanding and advancement in the field of MCHS (Niazmand et al, 2010, Ramiar et al, 2012, Zade et al, 2015, Wang et al, 2015, Hamedi et al, 2016, Kaya, 2016.…”