Heat transfer enhancement by spinodal decomposition in micro heat exchangers

Farisè, S.; Poesio, Pietro; Beretta, Gian Paolo

doi:10.1051/matecconf/20130301075

Cited by 3 publications

(7 citation statements)

References 7 publications

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“…This effect can be explained as the result of (spinodal-decomposition induced) convective motion: the free energy released during spinodal decomposition acts as a driving force for the phase separation, leading to the spontaneous formation of singlephase domains which then proceed to grow and coalesce; this convective motion enhances the transport of internal energy and results in an appreciable heat transfer enhancement. Based on our proof-of-concept fundamental experiments in [Poesio et al (2006)], [Poesio et al (2007)], [Poesio et al (2009)], [Farisé et al (2012)] this technology was awaiting use in a configuration more relevant from the applications point of view, such as in a flowing system. The ultimate goal has been the design of a proof-of-concept micro/mini heat exchanger based on liquid-liquid spinodal decomposition.…”

Section: Discussionmentioning

confidence: 99%

Microscale Heat Transfer Enhancement using Spinodal Decomposition of Binary Liquid Mixtures: A Collaborative Modeling/Experimental Approach

Beretta¹,

Poesio²

2013

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Section: Discussionmentioning

confidence: 99%

Microscale Heat Transfer Enhancement using Spinodal Decomposition of Binary Liquid Mixtures: A Collaborative Modeling/Experimental Approach

Beretta¹,

Poesio²

2013

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“…Therefore, in addition to the visualization of the phenomena in a closed cell (see Sec. 2), visualization experiments in a flowing cell have been recently carried out using a binary mixture, acetone and hexadecane at critical composition (Farisé, 2012). In Fig.…”

Section: Visualization Of Phase Separation In Microchannelsmentioning

confidence: 99%

“…The channel (800 µm × 700 µm) is made by a square groove in a microscope glass slide with particular attention given to the surface roughness. A complete description of the setup can be found in Farisé et al (2012).…”

Section: Visualization Of Phase Separation In Microchannelsmentioning

confidence: 99%

“…The same mixture was also used in Farisé et al (2012) to assess the heat transfer performances in small-scale heat exchangers. To measure the heat transfer enhancement effect due to spinodal decomposition, a closed-loop experimental setup has been developed ( Fig.…”

Section: Experiments With Ucst Systemsmentioning

confidence: 99%

“…whereQ ← Joule is the measured electrical power absorbed by the hot-reservoir resistor for the actual flow conditions, andQ ← Joule no decomposition is assumed to be equal to the average of the measured electrical power absorbed when using either one of the pure fluids. Further details can be found in Farisé et al (2012). Figure 24 shows the heat transfer enhancement vs. the flow rate in each of the multichannels of the heat exchanger.…”

Section: Fig 23mentioning

confidence: 99%

See 2 more Smart Citations

Enhancing Heat Transfer Rates by Inducing Liquid-Liquid Phase Separation: Applications and Modeling

Ullmann

Poesio

Brauner

2015

Interfac Phenom Heat Transfer

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This paper focuses on heat transfer enhancement during spinodal decomposition, and it provides an updated review as well as a discussion of future developments. The analysis is mainly based on the work of two research groups at Tel-Aviv University (Israel) and at University of Brescia (Italy). We review the theory of spinodal decomposition of liquid-liquid binary mixtures and we discuss the diffuse interface (DI) approach. While mass and momentum equations in the DI approach have been developed and discussed in other works, we also look into the energy equation, which has been only recently investigated. Direct visualizations of both static and flowing mixture during decomposition are provided. Visualizations of the decomposition in a quiescent fluid have been previously reported, while flowing conditions have been analyzed only recently. Interestingly enough, the morphology is rather different during flowing conditions, where the decomposition exhibits a nucleationlike morphology and not the typical bicontinuous structure observed during spinodal decomposition of a quiescent fluid. Enhancement of heat transfer performances is shown in channels (sizes of 0.8 and 2 mm) using an upper critical solution temperature (UCST) mixture. Although different conditions are analyzed, the results show a consistent enhancement of the heat transfer. The paper reports also some new experimental work on the heat transfer for a lower critical solution temperature (LCST) mixture that can be actually used in cooling applications. A coarse-grained model that could be potentially used for the sizing of large-scale equipment is discussed in term of a possible future development that needs to be further investigated and validated.

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Transport Properties of Water–Triethylamine Fluid Mixtures Calculated Using Molecular Dynamics

Damone

Poesio

2019

J. Chem. Eng. Data

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The knowledge of transport properties is crucial to design new devices in electronic and biotechnological industries. Due to the fast growth of the processor speed, molecular simulations have become a robust method to calculate the transport properties. In this work, we show numerical methods such as Green–Kubo formalism to estimate transport properties applied to real liquids. We focus on the study of shear viscosity and thermal conductivity of a water (H2O) and triethylamine (C6H15N) solution which has a potential application for heat exchange inside electronic circuits. The radial distribution function and hydrogen-bond analysis have been made at a broad range of temperatures and mole fractions using equilibrium molecular dynamics, and comparisons with experimental data in the literature have been reported.

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Heat transfer enhancement by spinodal decomposition in micro heat exchangers

Cited by 3 publications

References 7 publications

Microscale Heat Transfer Enhancement using Spinodal Decomposition of Binary Liquid Mixtures: A Collaborative Modeling/Experimental Approach

Microscale Heat Transfer Enhancement using Spinodal Decomposition of Binary Liquid Mixtures: A Collaborative Modeling/Experimental Approach

Enhancing Heat Transfer Rates by Inducing Liquid-Liquid Phase Separation: Applications and Modeling

Transport Properties of Water–Triethylamine Fluid Mixtures Calculated Using Molecular Dynamics

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