نتایج جستجو برای: thermophysical properties

تعداد نتایج: 869625  

Journal: :journal of heat and mass transfer research(jhmtr) 2014
mohammad hemmat esfe seyfolah saedodin

experimental study of effective thermal conductivity of zno/eg nanofluid is presented in thisresearch. the nanofluid was prepared by dispersing zno nanoparticles in ethylene glycol using asonicator and adding surfactant. ethylene glycol based nanofluid containing zno nanoparticlewith a nominal diameter of 18 nm at different solid volume fractions (very low to high) atvarious temperatures was ex...

Journal: :journal of agricultural science and technology 2010
m. dalvi n. hamdami

information on the thermophysical properties of the iranian ultrafiltrated (uf) white cheese is very limited. in this research, those thermal properties determined experimentally were thermal conductivity, specific heat, density and water activity. the thermal conductivity and specific heat of iranian ultrafiltrated white cheese (iufwc) ranged from 0.447 to 0.480 w m-1 °c-1 and from 3.871 to 4....

Journal: :مکانیک سیالات و آیرودینامیک 0
فرزاد بازدیدی طهرانی علیرضا شمسی سعید مقدم مسعود آقاامینی

the present paper investigates turbulent mixed convection - radiation flow between two vertical parallel plates kept at different temperatures with variable thermophysical properties. the reynolds number, based on channel half-width and friction velocity and the grashof number, based on channel width and wall temperature difference, were assumed to be 150 and 1.6×106, respectively. numerical si...

2014
Ian H. Bell Jorrit Wronski Sylvain Quoilin Vincent Lemort

Over the last few decades, researchers have developed a number of empirical and theoretical models for the correlation and prediction of the thermophysical properties of pure fluids and mixtures treated as pseudo-pure fluids. In this paper, a survey of all the state-of-the-art formulations of thermophysical properties is presented. The most-accurate thermodynamic properties are obtained from mu...

2014
Andreas Paul Fröba Alfred Leipertz Andreas Paul FRÖBA Alfred LEIPERTZ

The present paper summarizes the activities at LTT-Erlangen on the field of thermophysical properties research for pure refrigerants and refrigerant mixtures. For the characterization of their thermophysical properties dynamic light scattering (DLS) has been intensively applied as a key tool during the past two decades. Beside a representation of the essential features of DLS for the determinat...

In this paper, the natural convection heat transfer of Al2O3-EG-water nanofluid in a rectangular cavity which is heated from the bottom and is cooled from the top has been investigated numerically. The governing equations for a Newtonian fluid have been solved numerically with a finite volume approach using the SIMPLER algorithm. The main focus of the current study is on the effects of variable...

2011
Yong J. Lv Min Chen

We review the studies on the thermophysical properties of undercooled metals and alloys by molecular simulations in recent years. The simulation methods of melting temperature, enthalpy, specific heat, surface tension, diffusion coefficient and viscosity are introduced and the simulated results are summarized. By comparing the experimental results and various theoretical models, the temperature...

2009
Pierre Carlès

This article presents a general introduction to the physics and dynamics of supercritical fluids and the critical point. It is organized in two parts: In a first section, the nature of the critical point is discussed and its influence on the properties of supercritical fluids is presented; In a second section, we then examine the dynamic processes induced by these peculiar properties, concentra...

2001
Gang Chen

Engineered microand nanostructures may possess superb properties unattainable in nature. Examples are the photonic crystals for electromagnetic waves and quantum wells for electronic waves. In this article, we focus on engineering thermophysical properties of microand nanostructures. A brief historical perspective is provided on the motivations to engineer the properties of matters, followed by...

Nanofluids are the heat transfer fluids having remarkable thermal properties. The paper presents the experimental analysis of thermal conductivity, density, specific heat and viscosity of multiwalled carbon nanoparticles dispersed in water at various temperatures and particle concentrations. To examine the forced convection heat transfer of Multiwalled Carbon Nanotubes (MWCNT)-water nanofluid, ...

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