Magnetic resonance imaging of freezing in packed beds

John G. Georgiadis

Research output: Contribution to journalConference articlepeer-review

Abstract

Full-field quantitative visualization of freezing interfaces requires the introduction of high resolution noninvasive methods. Magnetic Resonance Imaging (MRI) is a versatile tool for mapping the distribution of liquids (primarily water) in three-dimensional space, and is the only practical solution in systems that are strongly refracting or opaque to visible light. MRI is employed (for the first time) to visualize freezing in water-saturated packed beds consisting of spherical beads cooled from below. Imaging of the interstitial water in liquid form is accomplished by exploiting the strong contrast in MRI signal between interstitial ice and liquid water. Extra provisions in terms of design and choice of materials of the test section were necessary to accommodate the special environment of the MRI scanner. Our implementation of MRI allows fully three-dimensional reconstruction of the solidification front and adequate time resolution to quantify the freezing of the pore water.

Original languageEnglish (US)
Pages (from-to)143-155
Number of pages13
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume302
StatePublished - Jan 1 1995
EventProceedings of the Energy-Sources Technology Conference and Exhibition - Houston, TX, USA
Duration: Jan 29 1995Feb 1 1995

ASJC Scopus subject areas

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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