A numerical study of the effect of turbulence on mass transfer from a single fuel droplet evaporating in a hot convective flow

被引：26

作者：

Abou Al-Sood, M. M. ^{[1
]}

Birouk, M. ^{[1
]}

机构：

[1] Univ Manitoba, Dept Mech & Mfg Engn, Winnipeg, MB R3T 5V6, Canada

来源：

INTERNATIONAL JOURNAL OF THERMAL SCIENCES | 2007年 / 46卷 / 08期

基金：

加拿大自然科学与工程研究理事会;

关键词：

numerical modeling; freestream turbulence; droplet; vaporization; heat transfer;

D O I：

10.1016/j.ijthermalsci.2006.10.007

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A three-dimensional numerical model is developed to investigate the effect of turbulence on mass transfer from a single droplet exposed to a freestream of air. The freestream temperature, turbulence intensity and Reynolds number are varied to provide a wide range of test conditions, whereas the ambient pressure is kept atmospheric. The turbulence terms in the conservation equations of the gas-phase are modelled by using the shear-stress transport (SST) model. A Cartesian grid based blocked-off technique is used in conjunction with the finite-volume method to solve numerically the governing equations of the gas and liquid-phases. This study showed that the vaporization Damkohler number proposed in the literature to correlate the effect of turbulence on the droplet's vaporization rate is invalid at air temperatures higher than room temperature. Additionally, an attempt is made to correlate the effect of the freestream turbulence on the droplet's mass transfer rate by using Sherwood number over a wide range of freestream temperatures. (c) 2006 Elsevier Masson SAS. All rights reserved.

引用

页码：779 / 789

页数：11

共 36 条

[21] COMPARISON BETWEEN EXPERIMENTAL MEASUREMENTS AND NUMERICAL PREDICTIONS OF INTERNAL TEMPERATURE DISTRIBUTIONS OF A DROPLET VAPORIZING UNDER HIGH-TEMPERATURE CONVECTIVE CONDITIONS [J].

MEGARIDIS, CM .

COMBUSTION AND FLAME, 1993, 93 (03) :287-302

[22] 2-EQUATION EDDY-VISCOSITY TURBULENCE MODELS FOR ENGINEERING APPLICATIONS [J].

MENTER, FR .

AIAA JOURNAL, 1994, 32 (08) :1598-1605

[23] Droplet vaporisation characteristics of vegetable oil derived biofuels at high temperatures [J].

Morin, C ;

Chauveau, C ;

Gökalp, I .

EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2000, 21 (1-3) :41-50

[24]

PARK JK, 1987, THESIS U WISCONSIN M

[25]

Perry R.H, 1997, PRERRYS CHEM ENG HDB

[26]

Reid R. C., 1977, The Properties of Gases and Liquids

[27] A MASS-TRANSFER CORRELATION FOR DROPLET EVAPORATION IN HIGH-TEMPERATURE FLOWS [J].

RENKSIZBULUT, M ;

NAFZIGER, R ;

LI, XG .

CHEMICAL ENGINEERING SCIENCE, 1991, 46 (09) :2351-2358

[28] INFLUENCE OF TURBULENCE ON MASS-TRANSFER BETWEEN A LIQUID AND A SOLID SPHERE [J].

SANDOVALROBLES, JG ;

DELMAS, H ;

COUDERC, JP .

AICHE JOURNAL, 1981, 27 (05) :819-823

[29] Models for droplet transient heating: Effects on droplet evaporation, ignition, and break-up [J].

Sazhin, SS ;

Abdelghaffar, WA ;

Sazhina, EM ;

Heikal, MR .

INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2005, 44 (07) :610-622

[30] HYDRODYNAMICS AND HEAT-TRANSFER ASSOCIATED WITH CONDENSATION ON A MOVING DROP - SOLUTIONS FOR INTERMEDIATE REYNOLDS-NUMBERS [J].

SUNDARARAJAN, T ;

AYYASWAMY, PS .

JOURNAL OF FLUID MECHANICS, 1984, 149 (DEC) :33-58

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