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Issue 14, 2014
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Simultaneous thermal and optical imaging of two-phase flow in a micro-model

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Abstract

In the study of non-equilibrium heat transfer in multiphase flow in porous media, parameters and constitutive relations, like heat transfer coefficients between phases, are unknown. In order to study the temperature development of a relatively hot invading immiscible non-wetting fluid and, ultimately, approximate heat transfer coefficients, a transparent micro-model is used as an artificial porous medium. In the last few decades, micro-models have become popular experimental tools for two-phase flow studies. In this work, the design of an innovative, elongated, PDMS (polydimethylsiloxane) micro-model with dimensions of 14.4 × 39 mm2 and a constant depth of 100 microns is described. A novel setup for simultaneous thermal and optical imaging of flow through the micro-model is presented. This is the first time that a closed flow cell like a micro-model is used in simultaneous thermal and optical flow imaging. The micro-model is visualized by a novel setup that allowed us to monitor and record the distribution of fluids throughout the length of the micro-model continuously and also record the thermal signature of the fluids. Dynamic drainage and imbibition experiments were conducted in order to obtain information about the heat exchange between the phases. In this paper the setup as well as analysis and qualitative results are presented.

Graphical abstract: Simultaneous thermal and optical imaging of two-phase flow in a micro-model

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Publication details

The article was received on 13 Mar 2014, accepted on 11 Apr 2014 and first published on 23 May 2014


Article type: Paper
DOI: 10.1039/C4LC00321G
Lab Chip, 2014,14, 2515-2524

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    Simultaneous thermal and optical imaging of two-phase flow in a micro-model

    N. K. Karadimitriou, P. Nuske, P. J. Kleingeld, S. M. Hassanizadeh and R. Helmig, Lab Chip, 2014, 14, 2515
    DOI: 10.1039/C4LC00321G

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