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Numerical methods for micro heat exchangers

Sundén, Bengt LU ; Wu, Zan LU and Faghri, Mohammad (2017) 5. p.131-172
Abstract

This chapter presents a state-of-the-art overview of numerical methods for single-phase flow and two-phase flow in microchannel heat exchangers, as well as the relevant single-phase and two-phase computational fluid dynamics (CFD) applications. Governing equations are given for both single-phase flow and two-phase flow with and without phase change. For single- phase flow, scaling effects, such as conjugate heat transfer and viscous heat dissipation, are considered for their significance on fluid flow and heat transfer in micro heat exchangers. For two-phase flow, the challenges of numerical modeling and the relative magnitudes of the dominant forces are discussed. Characteristics of the multiphase flow modeling approaches (i.e., the... (More)

This chapter presents a state-of-the-art overview of numerical methods for single-phase flow and two-phase flow in microchannel heat exchangers, as well as the relevant single-phase and two-phase computational fluid dynamics (CFD) applications. Governing equations are given for both single-phase flow and two-phase flow with and without phase change. For single- phase flow, scaling effects, such as conjugate heat transfer and viscous heat dissipation, are considered for their significance on fluid flow and heat transfer in micro heat exchangers. For two-phase flow, the challenges of numerical modeling and the relative magnitudes of the dominant forces are discussed. Characteristics of the multiphase flow modeling approaches (i.e., the Eulerian-Eulerian method, the Eulerian-Lagrangian method, and direct numerical simulation [DNS]) are compared. The advantages and disadvantages of several continuum DNS methods for interface evolution (e.g., volume of fluid [VOF], level set, phase field, front-tracking, and moving mesh methods) and the mesoscopic lattice Boltzmann method (LBM) are discussed. Methods to address the mass nonconservation in the level set method are briefly provided. Because microchannels are the basic elements of micro heat exchangers, recent CFD applications of two-phase flow in microchannels, mostly limited to the scale of a few bubbles or droplets, are briefly summarized. Future research needs for numerical modeling of micro heat exchangers are suggested.

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author
; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Numerical Simulation of Heat Exchangers : Advances in Numerical Heat Transfer - Advances in Numerical Heat Transfer
volume
5
pages
42 pages
publisher
CRC Press
external identifiers
  • scopus:85052898619
ISBN
9781482250190
9781482250206
DOI
10.1201/9781315372587
language
English
LU publication?
yes
id
1dd48c6d-6211-466f-be38-79a927f2ddcd
date added to LUP
2018-11-01 09:24:27
date last changed
2024-03-02 10:32:54
@inbook{1dd48c6d-6211-466f-be38-79a927f2ddcd,
  abstract     = {{<p>This chapter presents a state-of-the-art overview of numerical methods for single-phase flow and two-phase flow in microchannel heat exchangers, as well as the relevant single-phase and two-phase computational fluid dynamics (CFD) applications. Governing equations are given for both single-phase flow and two-phase flow with and without phase change. For single- phase flow, scaling effects, such as conjugate heat transfer and viscous heat dissipation, are considered for their significance on fluid flow and heat transfer in micro heat exchangers. For two-phase flow, the challenges of numerical modeling and the relative magnitudes of the dominant forces are discussed. Characteristics of the multiphase flow modeling approaches (i.e., the Eulerian-Eulerian method, the Eulerian-Lagrangian method, and direct numerical simulation [DNS]) are compared. The advantages and disadvantages of several continuum DNS methods for interface evolution (e.g., volume of fluid [VOF], level set, phase field, front-tracking, and moving mesh methods) and the mesoscopic lattice Boltzmann method (LBM) are discussed. Methods to address the mass nonconservation in the level set method are briefly provided. Because microchannels are the basic elements of micro heat exchangers, recent CFD applications of two-phase flow in microchannels, mostly limited to the scale of a few bubbles or droplets, are briefly summarized. Future research needs for numerical modeling of micro heat exchangers are suggested.</p>}},
  author       = {{Sundén, Bengt and Wu, Zan and Faghri, Mohammad}},
  booktitle    = {{Numerical Simulation of Heat Exchangers : Advances in Numerical Heat Transfer}},
  isbn         = {{9781482250190}},
  language     = {{eng}},
  month        = {{01}},
  pages        = {{131--172}},
  publisher    = {{CRC Press}},
  title        = {{Numerical methods for micro heat exchangers}},
  url          = {{http://dx.doi.org/10.1201/9781315372587}},
  doi          = {{10.1201/9781315372587}},
  volume       = {{5}},
  year         = {{2017}},
}