... branch solutions when the velocity ratio is varied. To assess which of these solutions is practically realizable, an asymptotic analysis on unsteady perturbations for a large time leading to linear stability needs to be performed. This shows that the upper branch solutions are always stable...

...S. B. Naveen; B. M. Shankar; I. S. Shivakumara The simultaneous effect of a time-dependent velocity term in the momentum equation and a maximum density property on the stability of natural convection in a vertical layer of Darcy porous medium is investigated. The density is assumed to vary...

...Ramesh B. Kudenatti; Noor E. Misbah; M. C. Bharathi This paper studies the linear stability of the unsteady boundary-layer flow and heat transfer over a moving wedge. Both mainstream flow outside the boundary layer and the wedge velocities are approximated by the power of the distance along...

... (LHP)-based hydraulic temperature control was investigated to improve the stability of the proposed technique. Start-up characteristics and transient responses of the operating temperatures to different pressure steps and sink temperatures were examined. From the test results, it was found...

.... Editor: Bruce L. Drolen. 23 12 2012 24 08 2013 Supercritical fluid based heat transfer loop (NCL) has become a hot topic in energy conversion systems. In such systems, supercritical natural convection stability and heat transfer conditions are crucial for design and safe operation...

... in literature. 16 02 2010 09 11 2010 01 02 2011 01 02 2011 convection flow instability flow through porous media pattern formation permeability thermal conductivity vibrations vibration convection stability anisotropy Brinkman model Natural convection flows...

... on the solutions of the full steady governing equations, this paper also presents unsteady solutions that characterize the steady solutions’ attainability, stability (response to initial disturbances), and their response to ever-present minuscule noise on the condensing-surface. For this shear-driven flow...

... of height:diameter ratio of 1.9. Heating is with a constant flux lower surface and a constant temperature upper surface, and the stability criterion is determined for a step heat input. The critical Rayleigh number for the onset of convection is obtained in terms of a length scale normalized to the thermal...

... explicit or implicit finite difference schemes using only the perturbation terms; (2) development of new finite difference schemes, referred to as hybrid equations, which have better stability properties than the classical finite difference equations, permitting the use of larger values of the parameter ρ...

...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...

...N. M. Rao; B. Maiti; P. K. Das The present investigation describes the stability behavior of NCL with end heat exchangers. The one-dimensional transient conservation equations of the loop fluid and the two fluid streams of cold end and hot end heat exchangers are solved simultaneously using...

... Transfer Inverse Stability Temperature The classical direct problem in heat conduction is to determine the temperature distribution of a body as the time progresses. The task of determining the initial temperature distribution from the final distribution is distinct from the direct problem...

...Nancy Ma; John S. Walker; Laurent Martin Witkowski This paper presents a linear stability analysis for the thermocapillary convection in a liquid bridge bounded by two planar liquid-solid interfaces at the same temperature and by a cylindrical free surface with an axisymmetric heat input. The two...

... the numerically predicted steady axisymmetry-breaking bifurcation. The stability of convective flows in a two-dimensional rectangular cavity with similarly heated/insulated sidewalls was studied in 28 29 , where among several bifurcations of different type we found multiple...

...S. Generalis; M. Nagata The transition of internally heated inclined plane parallel shear flows is examined numerically for the case of finite values of the Prandtl number Pr. We show that as the strength of the homogeneously distributed heat source is increased the basic flow loses stability...

...Masato Nagata; Sotos Generalis The stability of internally heated convective flows in a vertical channel under the influence of a pressure gradient and in the limit of small Prandtl number is examined numerically. In each of the cases studied the basic flow, which can have two inflection points...

... Annulaire ,” Int. J. Heat Mass Transf. , 42 , pp. 61 – 72 . Gresho , P. M. , and Sani , R. L. , 1970 , “ The Effects of Gravity Modulation On The Stability of a Heated Fluid Layer ,” J. Fluid Mech. , 40 , pp. 783 – 806 . Biringen , S. , and Peltier , L. J. , 1990...

...W. H. Chen The flame structure and stability, as well as the vaporization rates of twin droplets exposed to a high-temperature, partially premixed flow are investigated in the present study. Two important parameters of the Reynolds number and ambient equivalence ratio are taken into consideration...

... Dec 1999 boiling film boiling heat transfer two-phase flow organic compounds Boiling Heat Transfer Instability Phase Change Stability Two-Phase Chlorofluorocarbon (CFC) substitutes are highly promising for electronic cooling applications ( 1 2 ). This work...

... Stability of Boiling on a Flat Plate: Effects of Heater Orientation W. W. Lin,1 J. C. Yang,1 and D. J. Lee12 Nomenclatures qc = equilibrium heat flux, W/m2 qF = coexisting film boiling heat flux, W/m2 qN = coexisting nucleate boiling heat flux, W/m2 6 = inclination angle, degree OJ = inclination angle...