نتایج جستجو برای: periodic heat flux

تعداد نتایج: 359779  

2013
Jianbing Meng Xiaojuan Dong

A theoretical analysis was carried out to investigate the characteristics of plasma arc injected transverse to a transverse-alternating magnetic field. Two mathematical models were developed to describe both the oscillating amplitude of the plasma arc root and the heat flux density distribution of plasma arc on the workpiece surface. The characteristic of plasma arc under the external transvers...

During the homogeneous-heterogeneous autocatalytic chemical reaction in the dynamics of micropolar fluid, relaxation of heat transfer is inevitable; hence Cattaneo-Christov heat flux model is investigated in this report. In this study, radiative heat flux through an optically thick medium is treated as nonlinear due to the fact that thermal radiation at low heat energy is distinctly different f...

2009
Alexa Griesel Sarah T. Gille Janet Sprintall Julie L. McClean Mathew E. Maltrud

Diffusivities diagnosed from eddy heat fluxes in eddying models tend to show unphysically large positive and negative values and it has been suggested that this is due to rotational components that do not influence the heat budget. We diagnose the rotational component of the horizontal eddy heat flux, as measured by its curl, in the Southern Ocean of the 1/10◦ Parallel Ocean Program as a functi...

2004
Jingbo Wang Nicholas Zabaras

A Bayesian inference approach is presented for the solution of the inverse heat conduction problem. The posterior probability density function (PPDF) of the boundary heat flux is computed given temperature measurements within a conducting solid. Uncertainty in temperature measurements is modeled as stationary zero-mean white noise. The inverse solution is obtained by computing the expectation o...

2014
Bei Pei Guo-yong Song

In this paper, burning performance of liquorices was tested by cone calorimeter. The results indicated that liquorices were easily to be ignited, the minimum ignition heat flux intensity theoretically can be speculated at 5.8822kW • m;during the early time of the ignition of liquorices, in view of the thick carbonized layer formed on the surface of samples, which delayed the pyrolysis of liquor...

2016
Sung-Yong Park Zhigang Wu

Digital microfluidics (DMF) driven by electrowetting-on-dielectric (EWOD) has recently been attracting great attention as an effective liquid-handling platform for on-chip cooling. It enables rapid transportation of coolant liquid sandwiched between two parallel plates and drop-wise thermal rejection from a target heating source without additional mechanical components such as pumps, microchann...

2015
Oleg A. Saenko Duo Yang Jonathan M. Gregory Paul Spence Paul G. Myers

We present ocean model sensitivity experiments aimed at separating the influence of the projected changes in the ‘‘thermal’’ (near-surface air temperature) and ‘‘wind’’ (near-surface winds) forcing on the patterns of sea level and ocean heat content. In the North Atlantic, the distribution of sea level change is more due to the ‘‘thermal’’ forcing, whereas it is more due to the ‘‘wind’’ forcing...

2007
R. VERZICCO K. R. SREENIVASAN K. R. Sreenivasan

We numerically investigate turbulent thermal convection driven by a horizontal surface of constant heat flux and compare the results with those of constant temperature. Below Ra≈ 10, where Ra is the Rayleigh number, when the flow is smooth and regular, the heat transport in the two cases is essentially the same. For Ra> 10 the heat transport for imposed heat flux is smaller than that for consta...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2009
Nianbei Li Fei Zhan Peter Hänggi Baowen Li

We investigate directed thermal heat flux across one-dimensional homogenous nonlinear lattices when no net thermal bias is present on average. A nonlinear lattice of Fermi-Pasta-Ulam-type or Lennard-Jones-type system is connected at both ends to thermal baths which are held at the same temperature on temporal average. We study two different modulations of the heat bath temperatures, namely: (i)...

Journal: :Annual Review of Heat Transfer 2019

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