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Title: Single and two-phase flow pressure drop and heat transfer in a rectangular metallic microchannel
Authors: Ozdemir, MR
Sahar, AM
Mahmoud, MM
Wissink, J
Karayiannis, TG
Keywords: Microchannel;Single phase flow;Flow boiling
Issue Date: 2014
Publisher: Brunel University London
Citation: 4th Micro and Nano Flows Conference, University College London, UK, 7-10 September 2014, Editors CS König, TG Karayiannis and S. Balabani
Series/Report no.: ID 169
Abstract: Numerical simulations were performed using Fluent 14.5 to investigate single-phase flow and conjugate heat transfer in a rectangular microchannel embedded in a heated copper block with a glass plate on top. The hydraulic diameter of the rectangular channel was 0.561 mm and its length was 62 mm. The working fluid used in this investigation was water and the Reynolds number was varied from 100 to 3000. Three models were investigated namely 2D, 3D thin-wall (heated from the bottom and three side heated) and 3D fully conjugate models. The numerical results were validated using experimental data and existing conventional theory. The experimental data were found to be in excellent agreement with the 3D thin-wall models while it were under predicted using the 3D full conjugate and 2D models. These findings demonstrated that the numerical scheme that was employed is able to provide an accurate simulation of flow and heat transfer in a microchannel. Also, the results demonstrated that there is a significant difference between the 3D thin-wall and fully conjugate models.
Description: This paper was presented at the 4th Micro and Nano Flows Conference (MNF2014), which was held at University College, London, UK. The conference was organised by Brunel University and supported by the Italian Union of Thermofluiddynamics, IPEM, the Process Intensification Network, the Institution of Mechanical Engineers, the Heat Transfer Society, HEXAG - the Heat Exchange Action Group, and the Energy Institute, ASME Press, LCN London Centre for Nanotechnology, UCL University College London, UCL Engineering, the International NanoScience Community,
ISBN: 978-1-908549-16-7
Appears in Collections:Brunel Institute for Bioengineering (BIB)
The Brunel Collection

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