Heat transfer and friction coefficients in corrugated ducts confined by sinusoidal and arc curves

Jianlei Niu, L. Z. Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

60 Citations (Scopus)

Abstract

The thermally developing laminar forced-convection flow and heat transfer characteristics in corrugated ducts confined by sinusoidal and arc curves, which are often encountered in honeycomb desiccant wheels, are numerically investigated via the boundary-fitted coordinate system. The control volume-based finite difference technique is applied to obtain the solution utilizing the numerically generated boundary-fitted coordinates. According to this method, the complex domain in the physical plane is transformed into a regular square domain in the computational plane. Studied and graphically illustrated are the effects of aspect ratios and bending ratios of the ducts on the friction coefficients and heat transfer coefficients under uniform wall temperature (T) boundary conditions. For the special cases of corrugated ducts such as circular, square, and flat sinusoidal, the results are compared with some findings in the literature, and very good agreement is obtained. Furthermore, variations of the bulk temperature, Nusselt numbers, velocity, and temperature profiles in the entire thermal entry region are plotted.
Original languageEnglish
Pages (from-to)571-578
Number of pages8
JournalInternational Journal of Heat and Mass Transfer
Volume45
Issue number3
DOIs
Publication statusPublished - 4 Dec 2001

Keywords

  • Boundary-fitted coordinates
  • Corrugated ducts
  • Friction coefficient
  • Heat transfer
  • Laminar flow

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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