Author/Authors :
Jayadevan, P. C Heat Transfer Research Laboratory - Department of Mechanical Engineering - Government Engineering College, Thrissur, Kerala, India , Siddharth, R R & D Department - Achira Labs Pvt Ltd, Bangalore, Karnataka, India , Kamath, Pradeep M Heat Transfer Research Laboratory - Department of Mechanical Engineering - Government Engineering College, Thrissur, Kerala, India
Abstract :
The present study aims at modeling the real random rough surface of a microchannel with structured rough
channel of known geometric parameters. The surface of the microchannel is created by sinusoidal function
using MATLAB code and 2D simulation of the model is carried out with commercial software ANSYS Fluent.
The height of the channel is varied from 100 to 250 μm and length of the channel is 12.5 mm. The range of
Reynolds number selected for analysis is 100 to 500 with water as the fluid medium. The roughness height is
selected within the range of actual manufacturing roughness level of microchannels. The results show that
channel geometry has significant influence on flow characteristics. A new non-dimensional roughness
parameter β, is proposed to represent the dependence of friction factor on geometric parameters in the laminar
region. A correlation for flow friction is developed as a function of roughness parameter and Reynolds number.
Keywords :
Correlation , Friction factor , Surface roughness , Numerical simulation , Microchannel
