RT Journal Article ID 34ad93ea7ae50f1e A1 Vyas, S. A1 Manglik, Raj M. A1 Jog, Milind A. T1 VISUALIZATION AND CHARACTERIZATION OF A LATERAL SWIRL FLOW STRUCTURE IN SINUSOIDAL CORRUGATED-PLATE CHANNELS JF Journal of Flow Visualization and Image Processing JO JFV YR 2010 FD 2011-01-08 VO 17 IS 4 SP 281 OP 296 K1 wavy-plate fin K1 flow visualization K1 velocity imaging K1 swirl flow K1 lateral vortex AB Curved surfaces interacting with fluid flow tend to produce swirl or secondary circulation, and such mechanisms in wavy-plate-fin channels have been investigated. The fluid recirculation or vortex structure in low Reynolds number flows in plate channels with sinusoidal corrugations is characterized by experimental flow visualization and Laser Doppler Velocimetry (LDV) measurements. The parametric effects of the wavy-plate geometry, described by its waviness aspect ratio γ (= 2 × amplitude/wavelength) and inter-plate spacing ratio ε (= spacing/2 × amplitude), are delineated. Wall-curvature-induced swirl is produced by fluid separation downstream of the wavy-surface peak, its reattachment upstream of the subsequent peak, and the consequent encapsulation of lateral recirculating cells in the channel-wall concavities. The characteristic signature of these trough-region vortices is significantly altered with increasing flow rate, inter-plate spacing ε, and severity of wall waviness γ, when the swirl tends to grow spatially and envelop much of the core-flow region. PB Begell House LK https://www.dl.begellhouse.com/journals/52b74bd3689ab10b,0b54a88d4ac558ac,34ad93ea7ae50f1e.html