... fingering dynamics was in reasonable agreement with theoretical analyses. In addition to that classical viscous large fingering, small-scale evaporation instability was observed leading to microscopic roughening of accelerating evaporation fronts. This instability might be explicitly related to evaporative...

...Shilpi Agarwal; Puneet Rana; B. S. Bhadauria nanofluid instability natural convection Rayleigh Bénard problem To superimpose the perturbations on the basic state, we write (24) v = v ' ,   p = p b + p ' ,   T f = T fb + T f...

... of data for the study of instability mechanisms of the Marangoni convection. Random fluctuations of acceleration, called g-jitter, are present at ISS. They are caused by the control thrust of ISS, mechanical vibrations, astronaut activities, and so on. The 1/3 octave frequency bands of the g-jitter...

...Suvash C. Saha; John C. Patterson; Chengwang Lei The natural convection boundary layer adjacent to an inclined plate subject to sudden cooling boundary condition has been studied. It is found that the cold boundary layer adjacent to the plate is potentially unstable to Rayleigh–Bénard instability...

... of filmwise flow in the aft portion of the solution. Even when a steady solution exists, the flow attainability is also shown to be difficult (because of waviness and other sensitivities) at large downstream distances. film condensation phase-change heat transfer two-phase flows stability instability...

...D. Y. Tzou Instability of natural convection in nanofluids is investigated in this work. As a result of Brownian motion and thermophoresis of nanoparticles, the critical Rayleigh number is shown to be much lower, by one to two orders of magnitude, as compared to that for regular fluids. The highly...

... destabilizing is not surprising. Variability of width leads to a reduction of coherence for the agency causing instability. With variability of height, there is a net gain in coherence. Case 4 70 f 4 ( ξ ) = 1 + τ sin 2 π ξ , 71 S = − τ 2 A 2 + 1 Thus...

... flow (favorable orientation) was found to be more complicated. While at the acceleration of 3 g the heat pipe performance improved, at higher accelerations instability developed with resulting large-amplitude oscillations of the evaporator temperature. The instability found in these experiments...

...Satish G. Kandlikar; Wai Keat Kuan; Daniel A. Willistein; John Borrelli The flow boiling process suffers from severe instabilities induced due to nucleation of vapor bubbles in a superheated liquid environment in a minichannel or a microchannel. In an effort to improve the flow boiling stability...

...Y. Y. Jiang; M. Shoji In a natural circular loop, the thermal convection demonstrates various spatial patterns and temporal instabilities. Problem consists in determining them with respects to thermal boundary conditions. To this end a multiple scales analysis is applied which resembles...

... induced surface energy variation has a tendency to stabilize the system, resulting in an increase in the critical Marangoni number for the onset of thermocapillary instability. Thermocapillary induced surface energy variation tends to decrease the temperature of hot surface spots and increase...

... Editor: M. Faghri. 22 October 2001 12 August 2002 03 12 2002 heat transfer flow simulation Augmentation Enhancement Heat Transfer Instability Unsteady Miniaturization of electronic components has increased circuit junction density and the associated heat loads...

... heat transfer channel flow Navier-Stokes equations computational fluid dynamics pulsatile flow flow instability pressure Channel Flow Computational Enhancement Forced Convection Instability Engineering devices frequently employ enhanced heat transfer surfaces 1 . Fins...

...Sherin M. Alex; Prabhamani R. Patil, Professor The convective instability of a horizontal fluid-saturated anisotropic porous layer, with internal heat source and inclined temperature gradient, subject to a gravity field varying with distance in the layer, is investigated. A linear stability...

... in the analysis. The presence of the electric field promotes instability by providing the electrohydrodynamic (EHD) extraction force. Qualitative stability maps for the annular two-phase flow are provided with and without the electric field presence. Onset of the instability is compared with the experimental data...

... an interfacial instability, which is different from the instability identified by Yih (1986). The effect of temperature-dependent viscosity on various unstable modes and mode competitions are studied. Analytical Convection Heat Transfer Instability Mixed Convection Preziosi, Chen, and Joseph 1...

... , Berkovsky Edition, Hemisphere, New York. Bashtovoy, V. G., Berkovsky, B. M., and Vislovich, A. N., 1988, Introduction to Thermomechanics of Magnetic Fluids , Berkovsky Edition, Hemisphere, New York. Finlayson , B. A. , 1970 , “ Convective Instability of Ferromagnetic Fluids ,” J. Fluid Mech...

.... The forward motion (advancing into the cross flow) of the cylinder during one cycle of oscillation has an effect to suppress the instability and the vortex formation. This leads to the occurrence of a smaller and symmetric vortex formation and a less enhancement of heat transfer than the case of antisymmetric...

...L. Czechowski, Graduate Student; J. M. Floryan, Professor, Fellow ASME Marangoni instability in a finite container with a deformable interface in the absence of gravity has been investigated. It is shown that the critical Marangoni number Ma cr is a non-monotonic function of the length...

... 2000 27 September 2000 natural convection confined flow vortices fluid oscillations Crystal Growth Enclosure Flows Heat Transfer Instability Liquid Metals Natural Convection Three-Dimensional Since experiments of Hurle et al. 1 , the problem in natural convection...