An experimental study of flow and heat transfer in sinusoidal wavy passages

Enhanced heat transfer due to curvature-induced lateral vortices in laminar flows in sinusoidal corrugated-plate channels

Mixing and dispersion in a baffled tube for steady laminar and pulsatile flow

Effect of fin waviness and spacing on the lateral vortex structure and laminar heat transfer in wavy-plate-fin cores

Heat transfer and pressure drop in corrugated channels

The occurrence and structure of longitudinal vortices are examined by a flow visualization technique for various sinusoidal wavy channels Longitudinal vortices are confirmed to appear in a channel with a narrow spacing in the range of geometrical parameters considered here The geometrical conditions for the onset of such vortices are shown by a diagram The longitudinal vortex is a kind of Taylor–Goertler vortex observed in a curved rectangular-section channel However, the wavy channel is different from the curved rectangular-section channel in the processes of vortex development and destruction It is found that an unstable mode, in which the vortices formed at the upper and lower walls of the channel have some interaction, leads to vortex destruction and significantly promotes the transition to turbulence

Occurrence and Structure of Taylor–Goertler Vortices Induced in Two-Dimensional Wavy Channels for Steady Flow

Oscillatory viscous flow in symmetric wavy-walled channels

Oscillatory flow in a symmetric sinusoidal wavy-walled channel at intermediate strouhal numbers

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Experimental Validation of Numerical Analysis of Flow across Tube Banks for Laminar Flow

The effect of the Strouhal number on several flow characteristics in a wavy-walled channel was numerically and experimentally studied for oscillatory flow. Although oscillatory flow is characterized by a vortex formation/ejection cycle for any Strouhal number, the peak of vortex strength appears at an intermediate Strouhal number for both instantaneous flow and steady streaming. The time required for erosion of the ejected vortex at the centerline of the channel is closely related to the vortex strength at the instant of zero flow rate.

Tatsuo Nishimura

Papers

Occurrence and Structure of Taylor–Goertler Vortices Induced in Two-Dimensional Wavy Channels for Steady Flow

Oscillatory viscous flow in symmetric wavy-walled channels

Oscillatory flow in a symmetric sinusoidal wavy-walled channel at intermediate strouhal numbers

Experimental Validation of Numerical Analysis of Flow across Tube Banks for Laminar Flow

Effect of Strouhal Number on Flow Characteristics in a Symmetric Sinusoidal Wavy-Walled Channel for Oscillatory Flow