Microwave Heating of a Liquid Stably Flowing in a Circular Channel Under the Conditions of Nonstationary Radiative-Convective Heat Transfer

V. V. Salomatov, E. M. Puzyrev, A. V. Salomatov

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A class of nonlinear problems of nonstationary radiative-convective heat transfer under the microwave action with a small penetration depth is considered in a stabilized coolant flow in a circular channel. The solutions to these problems are obtained, using asymptotic procedures at the stages of nonstationary and stationary convective heat transfer on the heat-radiating channel surface. The nonstationary and stationary stages of the solution are matched, using the "longitudinal coordinate–time" characteristic. The approximate solutions constructed on such principles correlate reliably with the exact ones at the limiting values of the operation parameters, as well as with numerical and experimental data of other researchers. An important advantage of these solutions is that they allow the determination of the main regularities of the microwave and thermal radiation influence on convective heat transfer in a channel even before performing cumbersome calculations. It is shown that, irrespective of the heat exchange regime (nonstationary or stationary), the Nusselt number decreases and the rate of the surface temperature change increases with increase in the intensity of thermal action.

Original languageEnglish
Pages (from-to)388-404
Number of pages17
JournalJournal of Engineering Physics and Thermophysics
Volume91
Issue number2
DOIs
Publication statusPublished - 1 Mar 2018

Keywords

  • heat radiation
  • microwave radiation
  • nonstationary heat transfer
  • Nusselt number
  • radiative-convective heat transfer
  • round channel
  • stabilized flow
  • Stark number
  • stationary heat transfer

Fingerprint

Dive into the research topics of 'Microwave Heating of a Liquid Stably Flowing in a Circular Channel Under the Conditions of Nonstationary Radiative-Convective Heat Transfer'. Together they form a unique fingerprint.

Cite this