Numerical study of buoyancy and inclination effects on transient mixed convection in a channel with two facing cavities with discrete heating

F. García, C. Treviño, J. Lizardi, L. Martínez-Suástegui

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

© 2019 Elsevier Ltd In this work, the two-dimensional mixed convection flow and heat transfer from a rectangular channel with two facing identical open cubic cavities with discrete heating is studied numerically. The walls facing the opening are isothermal and all other bounding walls of the cavities and the channel are non-adiabatic. A parametric study has been conducted using water (Pr=7) as the working fluid. The effect of buoyancy strength or Richardson number, Ri=Gr/Re 2 , and its corresponding sensitivity to duct orientation on the overall flow and thermal evolution in space and time is studied for Reynolds numbers from 100 to 1000, channel inclination of 0 o ≤ γ ≤ 90 o and cavity aspect ratios (AR, ratio between the width and height of the enclosures) of 0.25, 0.5 and 1. The complex flow features are comprehensively presented in the form of velocity, vorticity and temperature contours for a wide range in the parametric space. The results reported herein demonstrate that the cavity aspect ratio plays a significant role on the achieved flow and temperature fields, oscillation frequencies and heat transfer characteristics of the double cavity. In addition, it has been found that the Reynolds and Prandtl numbers as well as the heat losses through the channel walls have a strong influence on the dynamical response of the system for all values of the heat loss parameter.
Original languageAmerican English
Pages (from-to)295-314
Number of pages263
JournalInternational Journal of Mechanical Sciences
DOIs
StatePublished - 1 May 2019

Fingerprint

Mixed convection
Buoyancy
Heat losses
buoyancy
inclination
Aspect ratio
Reynolds number
convection
Heat transfer
Heating
cavities
heating
Prandtl number
Vorticity
Enclosures
Ducts
Flow fields
Temperature distribution
aspect ratio
heat transfer

Cite this

@article{ba5adc84904646f1885b61eb59285b88,
title = "Numerical study of buoyancy and inclination effects on transient mixed convection in a channel with two facing cavities with discrete heating",
abstract = "{\circledC} 2019 Elsevier Ltd In this work, the two-dimensional mixed convection flow and heat transfer from a rectangular channel with two facing identical open cubic cavities with discrete heating is studied numerically. The walls facing the opening are isothermal and all other bounding walls of the cavities and the channel are non-adiabatic. A parametric study has been conducted using water (Pr=7) as the working fluid. The effect of buoyancy strength or Richardson number, Ri=Gr/Re 2 , and its corresponding sensitivity to duct orientation on the overall flow and thermal evolution in space and time is studied for Reynolds numbers from 100 to 1000, channel inclination of 0 o ≤ γ ≤ 90 o and cavity aspect ratios (AR, ratio between the width and height of the enclosures) of 0.25, 0.5 and 1. The complex flow features are comprehensively presented in the form of velocity, vorticity and temperature contours for a wide range in the parametric space. The results reported herein demonstrate that the cavity aspect ratio plays a significant role on the achieved flow and temperature fields, oscillation frequencies and heat transfer characteristics of the double cavity. In addition, it has been found that the Reynolds and Prandtl numbers as well as the heat losses through the channel walls have a strong influence on the dynamical response of the system for all values of the heat loss parameter.",
author = "F. Garc{\'i}a and C. Trevi{\~n}o and J. Lizardi and L. Mart{\'i}nez-Su{\'a}stegui",
year = "2019",
month = "5",
day = "1",
doi = "10.1016/j.ijmecsci.2019.03.001",
language = "American English",
pages = "295--314",
journal = "International Journal of Mechanical Sciences",
issn = "0020-7403",
publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Numerical study of buoyancy and inclination effects on transient mixed convection in a channel with two facing cavities with discrete heating

AU - García, F.

AU - Treviño, C.

AU - Lizardi, J.

AU - Martínez-Suástegui, L.

PY - 2019/5/1

Y1 - 2019/5/1

N2 - © 2019 Elsevier Ltd In this work, the two-dimensional mixed convection flow and heat transfer from a rectangular channel with two facing identical open cubic cavities with discrete heating is studied numerically. The walls facing the opening are isothermal and all other bounding walls of the cavities and the channel are non-adiabatic. A parametric study has been conducted using water (Pr=7) as the working fluid. The effect of buoyancy strength or Richardson number, Ri=Gr/Re 2 , and its corresponding sensitivity to duct orientation on the overall flow and thermal evolution in space and time is studied for Reynolds numbers from 100 to 1000, channel inclination of 0 o ≤ γ ≤ 90 o and cavity aspect ratios (AR, ratio between the width and height of the enclosures) of 0.25, 0.5 and 1. The complex flow features are comprehensively presented in the form of velocity, vorticity and temperature contours for a wide range in the parametric space. The results reported herein demonstrate that the cavity aspect ratio plays a significant role on the achieved flow and temperature fields, oscillation frequencies and heat transfer characteristics of the double cavity. In addition, it has been found that the Reynolds and Prandtl numbers as well as the heat losses through the channel walls have a strong influence on the dynamical response of the system for all values of the heat loss parameter.

AB - © 2019 Elsevier Ltd In this work, the two-dimensional mixed convection flow and heat transfer from a rectangular channel with two facing identical open cubic cavities with discrete heating is studied numerically. The walls facing the opening are isothermal and all other bounding walls of the cavities and the channel are non-adiabatic. A parametric study has been conducted using water (Pr=7) as the working fluid. The effect of buoyancy strength or Richardson number, Ri=Gr/Re 2 , and its corresponding sensitivity to duct orientation on the overall flow and thermal evolution in space and time is studied for Reynolds numbers from 100 to 1000, channel inclination of 0 o ≤ γ ≤ 90 o and cavity aspect ratios (AR, ratio between the width and height of the enclosures) of 0.25, 0.5 and 1. The complex flow features are comprehensively presented in the form of velocity, vorticity and temperature contours for a wide range in the parametric space. The results reported herein demonstrate that the cavity aspect ratio plays a significant role on the achieved flow and temperature fields, oscillation frequencies and heat transfer characteristics of the double cavity. In addition, it has been found that the Reynolds and Prandtl numbers as well as the heat losses through the channel walls have a strong influence on the dynamical response of the system for all values of the heat loss parameter.

UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85062727683&origin=inward

UR - https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85062727683&origin=inward

U2 - 10.1016/j.ijmecsci.2019.03.001

DO - 10.1016/j.ijmecsci.2019.03.001

M3 - Article

SP - 295

EP - 314

JO - International Journal of Mechanical Sciences

JF - International Journal of Mechanical Sciences

SN - 0020-7403

ER -