Heat transfer in water under strong gradient magnetic fields

I. Mogi, C. Umeki, K. Takahashi, S. Awaji, K. Watanabe, M. Motokawa

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Heat transfer in water was visually investigated using a liquid-crystal sheet with thermochromism in a hybrid magnet. Upward thermal convection was significantly suppressed by gradient magnetic fields, however, it remained even under magnetic levitation conditions with a gradient field of B(dB/dz) = -1360 T 2m -1. A thermal conduction state without convection was realized under a stronger gradient field of B(dB/dz) = -2880 T 2m -1 at 35-40°C, and surprisingly the downward magnetic convection was observed under the same field at 40-45°C. The temperature dependence of the magnetic susceptibility of water is responsible for the convection behavior in the gradient fields.

Original languageEnglish
Pages (from-to)1682-1684
Number of pages3
JournalIEEE Transactions on Applied Superconductivity
Volume14
Issue number2
DOIs
Publication statusPublished - 2004 Jun

Keywords

  • Gradient magnetic field
  • Magnetic convection
  • Thermal convection
  • Water

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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