Impingement of coaxial jet on convex element for confined and unconfined flow

Thermal Performance of Jet Impingement with Spent Flow Management

The present study proposes novel micro-jet impingement heat sink with effusion holes for flow extraction. The design consists of impingement nozzles surrounded by multiple effusion holes to take away the spent fluid. A three-dimensional numerical model is used for steady, incompressible, laminar flow and conjugate heat transfer for the performance analysis of the proposed design. The computatio...

Mist/Steam Heat Transfer in Confined Slot Jet Impingement

Internal mist/steam blade cooling technology has been considered for the future generation of Advanced Turbine Systems (ATS). Fine water droplets of about 5 mm were carried by steam through a single slot jet onto a heated target surface in a confined channel. Experiments covered Reynolds numbers from 7500 to 25,000 and heat fluxes from 3 to 21 kW/m. The experimental results indicate that the co...

Absolute and convective instabilities of heated coaxial jet flow

This study investigates the inviscid, linear spatio-temporal stability of heated, compressible and incompressible coaxial jet flows. The influence of the temperature ratio and the velocity ratio between the core jet and the bypass stream on the transition from convectively to absolutely unstable flows is studied numerically. The investigation shows that for coaxial jets absolute instability can...

Nematode locomotion in unconfined and confined fluids

Nematode locomotion in unconfined and confined fluids Alejandro Bilbao,1 Eligiusz Wajnryb,2 Siva A. Vanapalli,3 and Jerzy Blawzdziewicz1 1Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409-1021, USA 2Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland 3Department of Chemical Engineering, Texas Tech University, Lubbock, Texas...

Experimental Studies of Inverted - Profile Coaxial Jet Flows