Dissipative particle dynamics simulation of natural convection using variable thermal properties

Eiyad Abu-Nada

doi:10.1016/j.icheatmasstransfer.2015.10.008

Dissipative particle dynamics simulation of natural convection using variable thermal properties

Eiyad Abu-Nada

Mechanical & Nuclear Engineering

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

Dissipative particle dynamics with energy conservation (eDPD) was used to investigate the effect of variable thermal properties on natural convection in liquid water over a wide range of Rayleigh Numbers. The problem selected for this study was a differential heated cavity. The eDPD results were compared to the finite volume solutions and the eDPD method predicted the effects of temperature-dependent conductivity and viscosity on temperature and flow fields throughout the cavity properly. The eDPD temperature-dependent model was able to capture the basic features of natural convection, such as development of thermal boundary layers, and development of natural convection circulation cells within the cavity. The eDPD results experienced some degree of compressibility at high values of Ra numbers (Ra=10⁵) and this problem was resolved by tuning the speed of sound of the eDPD model.

Original language	British English
Pages (from-to)	84-93
Number of pages	10
Journal	International Communications in Heat and Mass Transfer
Volume	69
DOIs	https://doi.org/10.1016/j.icheatmasstransfer.2015.10.008
State	Published - 1 Dec 2015

Keywords

Dissipative particle dynamics
Natural convection
Variable dynamic viscosity
Variable thermal conductivity

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10.1016/j.icheatmasstransfer.2015.10.008

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title = "Dissipative particle dynamics simulation of natural convection using variable thermal properties",

abstract = "Dissipative particle dynamics with energy conservation (eDPD) was used to investigate the effect of variable thermal properties on natural convection in liquid water over a wide range of Rayleigh Numbers. The problem selected for this study was a differential heated cavity. The eDPD results were compared to the finite volume solutions and the eDPD method predicted the effects of temperature-dependent conductivity and viscosity on temperature and flow fields throughout the cavity properly. The eDPD temperature-dependent model was able to capture the basic features of natural convection, such as development of thermal boundary layers, and development of natural convection circulation cells within the cavity. The eDPD results experienced some degree of compressibility at high values of Ra numbers (Ra=105) and this problem was resolved by tuning the speed of sound of the eDPD model.",

keywords = "Dissipative particle dynamics, Natural convection, Variable dynamic viscosity, Variable thermal conductivity",

author = "Eiyad Abu-Nada",

note = "Funding Information: The lead author would like to thank Khalifa University for funding the current research under Khalifa University Internal Research Level I program (KUIRF I) with the grant number 210041 . Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

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doi = "10.1016/j.icheatmasstransfer.2015.10.008",

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T1 - Dissipative particle dynamics simulation of natural convection using variable thermal properties

AU - Abu-Nada, Eiyad

N1 - Funding Information: The lead author would like to thank Khalifa University for funding the current research under Khalifa University Internal Research Level I program (KUIRF I) with the grant number 210041 . Publisher Copyright: © 2015 Elsevier Ltd.

PY - 2015/12/1

Y1 - 2015/12/1

N2 - Dissipative particle dynamics with energy conservation (eDPD) was used to investigate the effect of variable thermal properties on natural convection in liquid water over a wide range of Rayleigh Numbers. The problem selected for this study was a differential heated cavity. The eDPD results were compared to the finite volume solutions and the eDPD method predicted the effects of temperature-dependent conductivity and viscosity on temperature and flow fields throughout the cavity properly. The eDPD temperature-dependent model was able to capture the basic features of natural convection, such as development of thermal boundary layers, and development of natural convection circulation cells within the cavity. The eDPD results experienced some degree of compressibility at high values of Ra numbers (Ra=105) and this problem was resolved by tuning the speed of sound of the eDPD model.

AB - Dissipative particle dynamics with energy conservation (eDPD) was used to investigate the effect of variable thermal properties on natural convection in liquid water over a wide range of Rayleigh Numbers. The problem selected for this study was a differential heated cavity. The eDPD results were compared to the finite volume solutions and the eDPD method predicted the effects of temperature-dependent conductivity and viscosity on temperature and flow fields throughout the cavity properly. The eDPD temperature-dependent model was able to capture the basic features of natural convection, such as development of thermal boundary layers, and development of natural convection circulation cells within the cavity. The eDPD results experienced some degree of compressibility at high values of Ra numbers (Ra=105) and this problem was resolved by tuning the speed of sound of the eDPD model.

KW - Dissipative particle dynamics

KW - Natural convection

KW - Variable dynamic viscosity

KW - Variable thermal conductivity

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U2 - 10.1016/j.icheatmasstransfer.2015.10.008

DO - 10.1016/j.icheatmasstransfer.2015.10.008

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SN - 0735-1933

VL - 69

SP - 84

EP - 93

JO - International Communications in Heat and Mass Transfer

JF - International Communications in Heat and Mass Transfer

ER -

Dissipative particle dynamics simulation of natural convection using variable thermal properties

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Keywords

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