0
TECHNICAL PAPERS: Forced Convection

Large Eddy Simulation of Turbulent Heat Transfer in an Orthogonally Rotating Square Duct With Angled Rib Turbulators

[+] Author and Article Information
Akira Murata, Sadanari Mochizuki

Department of Mechanical Systems Engineering, College of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan

J. Heat Transfer 123(5), 858-867 (Mar 22, 2001) (10 pages) doi:10.1115/1.1389463 History: Received December 11, 1999; Revised March 22, 2001
Copyright © 2001 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Isocontours of time-averaged variables in ξ-η plane at three different streamwise locations (60 deg rib and Ro*=1; figures are projected onto x-y plane. Left and right figures are for streamwise velocity, w̄, and temperature, θ̄, respectively): (a) at rib location (at center in rib width); (b) at midpoint between ribs; and (c) in front of ribs (a half of rib width from ribs).
Grahic Jump Location
Spatial variation of streamwise wall shear stress and Nusselt number on four walls (60 deg rib and Ro*=0): (a) instantaneous wall shear stress; (b) instantaneous Nusselt number; (c) time-averaged wall shear stress; and (d) time-averaged Nusselt number.
Grahic Jump Location
Spatial variation of streamwise wall shear stress and Nusselt number on four walls (90 deg rib and Ro*=0): (a) time-averaged wall shear stress; and (b) time-averaged Nusselt number.
Grahic Jump Location
Spatial variation of streamwise wall shear stress and Nusselt number on four walls (60 deg rib and Ro*=1): (a) time-averaged wall shear stress; and (b) time-averaged Nusselt number.
Grahic Jump Location
Local Nusselt number profile at three different transverse locations on rib-roughened walls (60 deg rib); thick and thin lines are for trailing and leading walls, respectively, for e/D=0.1; □: experimental data of Chandra et al. 5 at x=0 for Rem=30,000,e/D=0.063, and P/e=10; ○, ▵: numerical results for the same rib arrangement as Chandra et al. 5 for Rem=4349 and 8429, respectively, with higher grid resolution of 71×71×71: (a) Ro*=0; and (b) Ro*=1.
Grahic Jump Location
Effect of rotation and angled ribs on wall-averaged Nusselt number, Nuw, and friction factor, f (lines and symbols are for 90 deg and 60 deg rib cases, respectively; ▪: trailing, •: leading, ▾: left, ▴: right , □: Num, ▵: f )
Grahic Jump Location
Schematic of a rotating rib-roughened duct and a grid system fitted to angled ribs
Grahic Jump Location
Time-averaged velocity vectors in y-z plane at transverse two locations (90 deg rib; left and right figures are for Ro*=0 and Ro*=1, respectively. The scale in each figure indicates the vector magnitude): (a) near left wall (x=−0.9); and (b) at transverse center (x=0).
Grahic Jump Location
Time-averaged velocity vectors in y-z plane at three different transverse locations (60 deg rib; legend is the same as that of Fig. 2): (a) near left wall (x=−0.9); (b) at transverse center (x=0); and (c) near right wall (x=+0.9).
Grahic Jump Location
Time-averaged velocity vectors (ū,v̄) in ξ-η plane at three different streamwise locations: (a) at rib location (at center in rib width); (b) at midpoint between ribs; (c) in front of ribs (a half of rib width from ribs). (60 deg rib; figures are projected onto x-y plane. The other legend is the same as that of Fig. 2)
Grahic Jump Location
Time-averaged velocity components on the nine lines of intersection between y-z and ξ-η planes (Ro*=0; left, middle, and right figures are for the transverse location of x=−0.9, 0, and +0.9, respectively): (a) at rib location (at center in rib width); (b) at midpoint between ribs; (c) in front of ribs (a half of rib width from ribs).
Grahic Jump Location
Time-averaged velocity components on the nine lines of intersection between y-z and ξ-η planes (Ro*=1; left, middle, and right figures are for the transverse location of x=−0.9, 0, and +0.9, respectively): (a) at rib location (at center in rib width); (b) at midpoint between ribs; and (c) in front of ribs (a half of rib width from ribs).
Grahic Jump Location
Time-averaged velocity vectors in x-z plane at a half of rib height from rib-roughened wall: (a) 90 deg, Ro*=0; (b) 60 deg, Ro*=0; (c) 60 deg, Ro*=1, near leading wall; (d) 60 deg, Ro*=1, near trailing wall.
Grahic Jump Location
Isocontours of time-averaged variables in ξ-η plane at three different streamwise locations (60 deg rib and Ro*=0; figures are projected onto x-y plane. Left and right figures are for streamwise velocity, w̄, and temperature, θ̄, respectively): (a) at rib location (at center in rib width); (b) at midpoint between ribs; and (c) in front of ribs (a half of rib width from ribs).

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In