Fluid Flow and Heat Transfer in Corrugated Wall Channels : 1st Report, Analysis in the Case Where Channels Are Bent Perpendicularly Two Times

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Abstract
Corrugated wall channels are investigated as a means of augmenting the forced-convection heat transfer with a single-phase flow in heat exchangers. At the first step of systematic studies to examine adequate configurations of corrugated wall channels, fluid flow states and heat transfer characteristics of laminar flows for parallel channels bent perpendicularly two times as fundamental elements of corrugated wall channels are calculated numerically for various values of pitch by a finite difference method. Consequently, aspects of flow, wall shear stress distributions, pressure losses, local Nusselt number distributions and heat transfer augmentations are shown, effects of bending are clarified, and adequate values of pitch are examined.

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