...Mohamed Hichem Gazzah; Hafedh Belmabrouk Purpose – The effects of a co-flow and inlet jet temperature on local entropy generation in turbulent round jets have been studied numerically. The second-order closure turbulence model has been used. The paper aims to discuss these issues. Design...

...S. Kubacki; E. Dick Purpose This paper aims to provide improvements to the newest version of the k‐ ω turbulence model of Wilcox for convective heat transfer prediction in turbulent axisymmetric jets impinging onto a flat plate. Design/methodology/approach Improvements to the heat transfer...

...Keivan Khademi Shamami; Madjid Birouk Purpose This paper aims to describe the numerical simulation of a three‐dimensional turbulent free jet issuing from a sharp‐edged equilateral triangular orifice into still air. Design/Methodology/approach The numerical simulation was carried out by solving...

...B.S. Yilbas; S.Z. Shuja Purpose The paper's aim is to provide information on heat transfer and flow characteristics for a jet emerging from a conical nozzle and impinging onto the cylindrical, which resembles the laser heating process, for researchers and graduate students working in the laser...

... to show the difficulties related to judging iteration and discretization errors in boiler modeling. Then, a single jet is studied in detail to determine the proper degree of local grid refinement required in the vicinity of jets in the full boiler model. Both a nonreactive axisymmetric jet exhausting...

...Suhil Kiwan Purpose Studying the effect of localized wall discharge on the fluid flow and heat transfer for a flow over backward facing step is the main purpose of this paper. Jet is used to control the reattachment length which controls the fluid flow and heat transfer downstream the step...

...Ahad Ramezanpour; Iraj Mirzaee; David Firth; Hassan Shirvani Purpose This paper seeks to conduct a numerical study to investigate heat transfer in turbulent, unconfined, submerged, and inclined impinging jet discharged from a slot nozzle, utilising finite volume code FLUENT. Design/methodology...

...S.Z. Shuja; B.S. Yilbas; M.O. Budair Purpose The purpose of this paper is to examine entropy generation rate in the flow field due jet emanating from an annular nozzle and impinging on to a flat plate. Since the flow field changes with the geometric configuration of the annular nozzle...

... the SST model is also observed to provide a quite good performance, which is close to that of the k‐ω model, for most of the investigated cases. Originality/value To date, computational investigation of turbulent jet impinging on to “rotating” disk has not received much attention...

... cooled micro‐channels etched in the silicon substrate have the potential to remove heat directly from the chip. For reasonable pressure drops, the flow in micro‐channels is inherently laminar, so that the heat transfer is not very large. A synthetic jet may be used to improve mixing, thereby considerably...

... of the reactant mixing rates. α age of the turbulence (or of a scalar) ε turbulence dissipation rate λ auxiliary function κ VonKarman constant Z generic transported scalar © Emerald Group Publishing Limited 2007 Turbulence Shearing Jets...

... rate of 5.95 m³/min (210 cfm) at the DAG. Since this is the Reynolds number that we are aiming for, some of our parametric studies are performed using these values instead of the “actual” operating conditions. © Emerald Group Publishing Limited 2006 Jets Air Velocity...

...B.S. Yilbas; S.Z. Shuja; M.O. Budair Gas jet assisting process finds wide application in industry due to its ability to alter the heat transfer characteristics of the region subjected to jet assisted processing. In the present study, jet impingement onto a cavity with elevated wall temperature...

...Bart Merci; Erik Dick The influence of computational aspects on simulation results is quantitatively investigated for the specific case of a turbulent piloted jet diffusion flame (Sandia Flame D). It is illustrated that, with a fixed turbulence and chemistry model, the results can heavily depend...

...B.S. Yilbas; S.Z. Shuja; M.O. Budair Jet impingement onto surface finds wide application in industry. In laser processing an assisting gas jet is introduced either to shield the surface from oxidation reactions or initiating exothermic reaction to increase energy in the region irradiated by a laser...

...S.Z. Shuja; B.S. Yilbas; M.O. Budair A confined laminar swirling jet is an interesting research topic due to flow and temperature fields generated in and across the jet. In the present study, a confined laminar swirling jet is studied, and flow and temperature fields are simulated numerically using...

...L.P. Goss; V.R. Katta; W.M. Roquemore The dynamics of a transitional propane jet diffusion flame with a fuel‐jet velocity of 2.2 m/s has been studied using an implicit, third‐order‐accurate, upwind numerical scheme. The large‐scale vortices outside the flame surface and the small‐scale ones inside...