Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

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    Experimental and numerical investigation on conjugate effects in deep parallel microchannel using tio2 nanofluid for electronic cooling
    (Dalian University of Technology, 2018) Narendran, G.; Gnanasekaran, N.; Arumuga Perumal, D.A.
    The present study reports the numerical investigation of laminar forced convection based on TiO2 nanofluid in a rectangular copper microchannel surrounded by Aluminium block to examine the cooling effects for increased flow rates and particle concentration. The analysis involves the use of pure fluid and TiO2 nanofluid with the volume fractions of 0.01, 0.15, 0.20 and 0.25% for different flow rates. The study also examines the influence of conjugate heat transfer behavior of the microchannel using commercially available software FLUENT-15. © 2018 by the authors of the abstracts.
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    Numerical study on fluid flow through collapsible channels
    (Springer, 2020) Dhruv, V.; Mishra, U.; Maniyeri, R.
    The fluid flow in collapsible channels or tubes is an interesting problem with several physiological applications; for example, blood flow in veins, air flow in lungs and wheezing. In this paper, we present a fluid-structure interaction based model for single-phase fluid flow through a microchannel containing two elastic walls. A two-dimensional model is developed and simulations have been performed using a commercial software. The deforming geometry is analyzed using moving mesh. The flow field and deformation of the elastic walls for different boundary loads and inlet flow conditions are presented and discussed. © Springer Nature Singapore Pte Ltd. 2020.
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    Microchannel Geometries and Rough Surfaces for Critical Heat Flux Enhancement in High Pressure Pool Boiling
    (Springer Science and Business Media Deutschland GmbH, 2024) Walunj, A.; Sathyabhama, A.
    This paper presents the performance of pool boiling heat transfer (PBHT) from square, parabolic and stepped microchannel under steady and exponential heat supply. The experiments are conducted at pressure ranging from 1 to 10 bar. The effect of channel profile on transient CHF is presented. The channel top and base width of square microchannel is 0.5 mm. The channel base width of parabolic and stepped microchannel is same as that of square microchannel, however, its channel top width is 0.8 mm. The channel height and number of channels are 0.5 mm and 9, respectively. The scratches are formed unidirectionally on the plain surface to attain surface roughness in the range of Ra = 0.106 to 4.03 µm. The comparison of CHF for surface roughness and microchannel surfaces is also carried to emphasis the effect of structured surfaces. The bubble morphology is studied with the help of 1000 fps high-speed camera. The microchannel geometries enhance the steady and transient CHF at all the operating pressures. However, exponential transient rate has insignificant role in the transient CHF. The forces exert during the bubble growth on the bubble meniscus is considered to determine the bubble departure diameter of the microchannel at all the operating pressures. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.