The use of impinging liquid jets in electronics thermal management is attracting some consideration due to their very high heat transfer coefficients, hot spot targeting capabilities and moderate hydraulic power requirements. In this investigation an experimental study of the cooling capabilities of impinging water jet arrays is presented. Of particular interest here is the influence that the i...

During the past two decades, the utilization of Active Chilled Beam (ACB) systems as promising air-conditioning systems has becoming increasingly prevalent in Europe, North America and Asia. However, the studies on air distribution of ACB systems are still inadequate. The air distribution has a great impact on thermal comfort. The ununiformity of air distribution will easily lead to turbulent f...

Aim: We optimized the process parameters of Melt Electrospinning Writing (MEW) to produce highly ordered structures composed of sub-micron filaments for Tissue Engineering (TE) purposes. [1] Methods: MEW has recently been introduced as a novel electrohydrodynamically assisted additive manufacturing (AM) process that allows a controlled deposition of electrically non-conductive fibers of particu...

Direct numerical simulation was used to study the effect of controlled forcing at the jet nozzle on downstream mixing in a Mach 0.8 jet. The jet was forced by small slot jet actuators near the nozzle lip which blew normal to the initial jet shear layer and excited a flapping mode in the jet. The actuator jets and the nozzle itself were not explicitly simulated to spare the expense of including ...

An investigation is made into the effects of water jet pressure, nozzle diameter, traverse speed of the nozzle over the rock surface and the number of times the jet passes over the same area on the penetration of a water jet into Indiana limestone. The effectiveness of the cut is judged on the depth of cut established and the specific energy of rock removal. Pressure is varied in the range from...

Numerical studies have been carried out using a validated two-dimensional standard k-omega turbulence model for the design optimization of a thrust vector control system using shock induced self-impinging supersonic secondary double jet. Parametric analytical studies have been carried out at different secondary injection locations to identifying the highest unsymmetrical distribution of the mai...

An anomalous lineshape of stimulated Raman spectra obtained from the region very close to the nozzle of supersonic pulsed expansions of nitrogen is presented. High resolution Raman spectra of the Q branch of the fundamental vibration mode of N2 have been recorded from two different nitrogen expansions at T0 = 295 K and P0 = 1.5−3.5 bar, the lasers crossing the jet axis in the range z/D = 0.25 −...