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Numerical analysis of non-isothermal viscous jet with peripheral heat transfer

International Journal of Modeling, Simulation, and Scientific Computing 2016年第3期7卷 50-73页

作者： Sulagna Chatterjee trisha sen Anindya Mitra Department of Chemical Engineering Heritage Institute of Technology Kolkata 700107India Department of Chemical Engineering IIT Bombay Mumbai 400076India Department of Chemical Engineering University of Waterloo ON N2L 3G1 Canada

A fluid jet ejected from micron size nozzle is a commonly occurring phenomenon in biomedical engineering,printing technology and micro-fluidic *** of a jet into drops occurs due to disturbances induced by external *** work explores the various sources of perturbation and their effect on jet disintegration through numerical simulation of a two-dimensional non-isothermal *** mathematical approach uses a novel technique to combine analytical solutions for the energy balance equation in the radial direction to solve the complete two dimensional *** two dimensional energy balance equation is simultaneously solved together with the axi-symmetric Navier–Stokes equations using the slender-jet approximation to predict jet *** energy balance takes into account of peripheral heat transfer to the environment through analytical expressions derived from radial *** model helps in understanding the factors in dynamic temperature variations that eventually render the jet *** distinguishing aspect of this work is the analysis of the effect of a periodic thermal perturbation applied at any point in the domain of a progressive jet,a situation typically encountered in thermal inkjet printers and not considered *** presented for non-isothermal jets which are both stationary and moving illustrate the effect of jet velocity in propagation of perturbation and subsequent drop *** major contribution of this numerical study is that it provides an insight on novel ways of controlling droplet formation in bubble jet *** study demonstrates that thermal disturbance propagating from periodic heating can be manipulated to shape the droplets and control their breakage point along the jet.

关键词： Nonlinear viscous microjets Bessel functions heat transfer Navier-Stokes slender jet approximation

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