NDLI: Computational Investigation of Laminar Mixed Convection in a Vertical Pipe With Slurries of a Microencapsulated Phase-Change Material in Distilled Water

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	David, A. Scott Lamoureux, Alexandre Baliga, B. Rabi
Copyright Year	2010
Abstract	A computational investigation of steady, laminar, mixed convection in a vertical pipe, with essentially uniform heat flux imposed on its outer surface and slurries of a microencapsulated phase-change material (MCPCM) particles suspended in distilled water as the working fluid flowing upwards, is presented. The MCPCM particles considered here have a core of solid-liquid PCM contained in a thin solid shell. The mean effective diameter of these particles is 2.5μm; the melting of the core PCM takes place primarily in the temperature range 26°C to 30°C; and the latent heat of fusion of this PCM is 129.5kJ/kg. The total length of the pipe is 2.2479m; and its inside and outside diameters are 0.01257m and 0.01588m, respectively. The main contributions of this paper are the following: i) a homogenous mathematical model is shown to be applicable to the aforementioned mixed convection phenomena; ii) correlations for the effective properties of the MCPCM slurries and procedures for their implementation are presented; iii) difficulties with the standard definition of bulk temperature when the specific heat of the fluid changes significantly with temperature are elaborated; iv) a modified bulk temperature that overcomes these difficulties is proposed; v) a finite volume method (FVM) for the solution of the proposed mathematical model is described briefly; and vi) the numerical results are presented, compared to complementary experimental data, and discussed. These comparisons show that proposed model and FVM allow cost-effective computer simulations of the problems of interest.
Sponsorship	Heat Transfer Division
Starting Page	451
Ending Page	462
Page Count	12
File Format	PDF
ISBN	9780791849422
DOI	10.1115/IHTC14-22974
e-ISBN	9780791838792
Volume Number	2010 14th International Heat Transfer Conference, Volume 7
Conference Proceedings	2010 14th International Heat Transfer Conference
Language	English
Publisher Date	2010-08-08
Publisher Place	Washington, DC, USA
Access Restriction	Subscribed
Subject Keyword	Water Temperature Melting Computer simulation Shells Heat of fusion Finite volume methods Heat flux Phase change materials Specific heat Fluids Particulate matter Mixed convection Pipes Slurries
Content Type	Text
Resource Type	Article

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