Numerical investigation of conjugated heat transfer in a channel with a moving depositing front

H. Y. Li, Yit F. Yap, J. Lou, J. C. Chai, Z. Shang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This article presents numerical simulations of conjugated heat transfer in a fouled channel with a moving depositing front. The depositing front separating the fluid and the deposit layer is captured using the level-set method. Fluid flow is modeled by the incompressible Navier-Stokes equations. Numerical solution is performed on a fixed mesh using the finite volume method. The effects of Reynolds number and thermal conductivity ratio between the deposit layer and the fluid on local Nusselt number as well as length-averaged Nusselt number are investigated. It is found that heat transfer performance, represented by the local and length-averaged Nusselt number reduces significantly in a fouled channel compared with that in a clean channel. Heat transfer performance decreases with the growth of the deposit layer. Increases in Reynolds, Prandtl numbers both enhance heat transfer. Besides, heat transfer is enhanced when the thermal conductivity ratio between the deposit layer and the fluid is lower than 20 but it decreases when the thermal conductivity ratio is larger than 20.

LanguageEnglish
Pages136-147
Number of pages12
JournalInternational Journal of Thermal Sciences
Volume88
DOIs
Publication statusPublished - 2015

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heat transfer
Heat transfer
Deposits
Nusselt number
deposits
Thermal conductivity
thermal conductivity
Fluids
fluids
finite volume method
Prandtl number
Finite volume method
Navier-Stokes equation
Navier Stokes equations
fluid flow
Flow of fluids
mesh
Reynolds number
conductivity
Computer simulation

Cite this

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title = "Numerical investigation of conjugated heat transfer in a channel with a moving depositing front",
abstract = "This article presents numerical simulations of conjugated heat transfer in a fouled channel with a moving depositing front. The depositing front separating the fluid and the deposit layer is captured using the level-set method. Fluid flow is modeled by the incompressible Navier-Stokes equations. Numerical solution is performed on a fixed mesh using the finite volume method. The effects of Reynolds number and thermal conductivity ratio between the deposit layer and the fluid on local Nusselt number as well as length-averaged Nusselt number are investigated. It is found that heat transfer performance, represented by the local and length-averaged Nusselt number reduces significantly in a fouled channel compared with that in a clean channel. Heat transfer performance decreases with the growth of the deposit layer. Increases in Reynolds, Prandtl numbers both enhance heat transfer. Besides, heat transfer is enhanced when the thermal conductivity ratio between the deposit layer and the fluid is lower than 20 but it decreases when the thermal conductivity ratio is larger than 20.",
keywords = "Conjugated heat transfer, Level-set method, Moving depositing front, Nusselt number",
author = "Li, {H. Y.} and Yap, {Yit F.} and J. Lou and Chai, {J. C.} and Z. Shang",
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Numerical investigation of conjugated heat transfer in a channel with a moving depositing front. / Li, H. Y.; Yap, Yit F.; Lou, J.; Chai, J. C.; Shang, Z.

In: International Journal of Thermal Sciences, Vol. 88, 2015, p. 136-147.

Research output: Contribution to journalArticle

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T1 - Numerical investigation of conjugated heat transfer in a channel with a moving depositing front

AU - Li, H. Y.

AU - Yap, Yit F.

AU - Lou, J.

AU - Chai, J. C.

AU - Shang, Z.

PY - 2015

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N2 - This article presents numerical simulations of conjugated heat transfer in a fouled channel with a moving depositing front. The depositing front separating the fluid and the deposit layer is captured using the level-set method. Fluid flow is modeled by the incompressible Navier-Stokes equations. Numerical solution is performed on a fixed mesh using the finite volume method. The effects of Reynolds number and thermal conductivity ratio between the deposit layer and the fluid on local Nusselt number as well as length-averaged Nusselt number are investigated. It is found that heat transfer performance, represented by the local and length-averaged Nusselt number reduces significantly in a fouled channel compared with that in a clean channel. Heat transfer performance decreases with the growth of the deposit layer. Increases in Reynolds, Prandtl numbers both enhance heat transfer. Besides, heat transfer is enhanced when the thermal conductivity ratio between the deposit layer and the fluid is lower than 20 but it decreases when the thermal conductivity ratio is larger than 20.

AB - This article presents numerical simulations of conjugated heat transfer in a fouled channel with a moving depositing front. The depositing front separating the fluid and the deposit layer is captured using the level-set method. Fluid flow is modeled by the incompressible Navier-Stokes equations. Numerical solution is performed on a fixed mesh using the finite volume method. The effects of Reynolds number and thermal conductivity ratio between the deposit layer and the fluid on local Nusselt number as well as length-averaged Nusselt number are investigated. It is found that heat transfer performance, represented by the local and length-averaged Nusselt number reduces significantly in a fouled channel compared with that in a clean channel. Heat transfer performance decreases with the growth of the deposit layer. Increases in Reynolds, Prandtl numbers both enhance heat transfer. Besides, heat transfer is enhanced when the thermal conductivity ratio between the deposit layer and the fluid is lower than 20 but it decreases when the thermal conductivity ratio is larger than 20.

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KW - Level-set method

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