Simulation of Various Cylindrical Size and Inlet Velocity Affect The Laminar Flow In Microchannel

This paper present a simulation on cylindrical microchannel with different size using COMSOL Multiphysics software. The simulation is focus on the time taken for fluid to flow in microchannel in order to reach laminar flow state. In the first part of simulation studied the various size of cylindrical microchannel affect the laminar flow state in microchannel. The second part is investigate the various inlet velocity affect the velocity magnitude in microchannel. The fluid used for the simulation is water and sodium chloride solution. The simulation is performed using COMSOL software. In the first part of simulation found out the time taken for water to reach laminar flow state is faster for 20 μm compared to 25 μm and 30 μm with 93% efficiency. For Sodium Chloride at 20μm it has the fastest time for the solution to reach laminar state with efficiency of 92.5%. Water is the best solution compared to sodium chloride. The performance decrease 1% gradually by increasing size 5 μm. In the second part of simulation, the inlet velocity affects the velocity magnitude in microchannel. The velocity magnitude decrease 20% gradually at inlet velocity 0.20 m/s and 0.25 m/s. The result shows 20μm is the best compared to 25μm and 30μm. The effect of microchannel size and different inlet velocity on the microchannel were observed and analyzed at the end of the simulation.