Investigating the effect of geometry on micro-channel heat exchangers using CFD analysis

J. Derek, A.N. Jinoop, C.P. Paul, S.L. Nidhin, N.G. Rasu, K.S. Bindra

Research output: Chapter in Book/Report/Conference proceedingChapter


Micro-channel heat exchangers (MCHEs) are compact and robust heat exchangers with high surface area per unit volume facilitating closer temperature of approach. MCHE is conventionally fabricated using photochemical etching followed by diffusion bonding (PCED). Though PCED allows various flow path designs for improved heat exchange, it is not deployed for MCHE with cross sections other than semi-circular. Laser additive manufacturing (LAM) can overcome this limitation. The present study is focused on thermo-hydraulic simulation of LAM built MCHE with various cross sections. A 3D steady-state computational fluid dynamics (CFD)-based analysis is performed using CFD code ANSYS CFX to estimate the temperature, pressure drop and velocity distribution across the length of channel and variation of friction factor with Reynolds number. The working fluid is supercritical helium and material of construction of MCHE is Inconel 617 (IN 617). The temperature-dependent thermo-physical properties of helium and IN 617 are taken into account for the above simulation. To validate the simulation output, the results for conventionally fabricated PCHE are compared with that of previously published results and are found to be within 5%. The study of MCHE with cross sections other than semi-circular (i.e. square and circular) is also done using the same CFD code. From this numerical analysis, it is found that the heat transfer is maximum in square geometry while pressure drop, velocity across the channel and friction factor are the least for square geometry.
Original languageEnglish
Title of host publicationAdvances in Fluid and Thermal Engineering
EditorsP Saha, P Subbarao, B Sikarwar
ISBN (Electronic)9789811364167
ISBN (Print)9789811364150
Publication statusPublished - 24 Apr 2019
EventFuture Learning Aspects for Mechanical Engineering - Noida, Delhi NCR, India
Duration: 3 Oct 20185 Oct 2018

Publication series

NameLecture Notes in Mechanical Engineering


ConferenceFuture Learning Aspects for Mechanical Engineering
Abbreviated titleFLAME2018
CityDelhi NCR


Dive into the research topics of 'Investigating the effect of geometry on micro-channel heat exchangers using CFD analysis'. Together they form a unique fingerprint.

Cite this