Three-dimensional Numerical Study of Laminar Confined Slot Jet Impingement Cooling using Slurry of Nano—encapsulated Phase Change Material

This Article presents a three dimensional numerical model investigating thermal performance and hydrodynamics features of the confined slot jet impingement using slurry of Nano Encapsulated Phase Change Material（NEPCM）as a coolant.The slurry is composed of water as a base fluid and n-octadecane NEPC...

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Bibliographic Details
Published in:Journal of thermal science 2016-10, Vol.25 (5), p.431-439
Main Authors: Mohib Ur Rehman, M., Qu, Z. G., Fu, R. P.
Format: Article
Language:English
Subjects:
Classical and Continuum Physics
Concentration (composition)
Engineering Fluid Dynamics
Engineering Thermodynamics
Heat and Mass Transfer
Heat transfer
Hydrodynamics
Jet impingement
Numerical models
Phase change materials
Physical properties
Physics
Physics and Astronomy
Pressure drop
Thermophysical properties
Three dimensional models
三维数值模型
冲击冷却
射流
数值研究
浆料粘度
相变材料
纳米包覆
缝隙
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Summary:This Article presents a three dimensional numerical model investigating thermal performance and hydrodynamics features of the confined slot jet impingement using slurry of Nano Encapsulated Phase Change Material（NEPCM）as a coolant.The slurry is composed of water as a base fluid and n-octadecane NEPCM particles with mean diameter of 100 nm suspended in it.A single phase fluid approach is employed to model the NEPCM slurry.The thermo physical properties of the NEPCM slurry are computed using modern approaches being proposed recently and governing equations are solved with a commercial Finite Volume based code.The effects of jet Reynolds number varying from 100 to 600 and particle volume fraction ranging from 0% to 28% are considered.The computed results are validated by comparing Nusselt number values at stagnation point with the previously published results with water as working fluid.It was found that adding NEPCM to the base fluid results with considerable amount of heat transfer enhancement.The highest values of heat transfer coefficients are observed at H/W=4 and C_m=0.28.However,due to the higher viscosity of slurry compared with the base fluid,the slurry can produce drastic increase in pressure drop of the system that increases with NEPCM particle loading and jet Reynolds number.
ISSN:1003-2169
1993-033X
DOI:10.1007/s11630-016-0881-8