kurdistan rasa grape is one of the delicious and sweet fruits with black color. it contains vitamins e, c and some protectors such as antioxidants. in order to design equipments and facilities for drying, preservation and processing of rasa grape, it is necessary and important to know about its specific heat and thermal conductivity. in this paper the specific heat and thermal conductivity of r...

The thermal conductivity, thermal diffusivity and heat capacity per unit volume of dunite rocks taken from Chillas near Gilgit, Pakistan have been measured simultaneously using transient plane source technique. The temperature dependence of thermal transport properties is studied in the temperature range 83-303 K. Different relations for the estimation of thermal conductivity are also tested. T...

In the current research, thermal conductivity of magnetite (Fe3O4) has been calculated using molecular dynamic simulation. The rNEMD Molecular Dynamics Method provided in the LMMPS package is used for the simulation of the thermal conductivity. The effects of magnetite layer size and temperature on the thermal conductivity have been investigated. The numerical results have...

polymethyl methacrylate (pmma), widely used as a prosthodontic base, has many disadvantages, including a high thermal expansion coefficient and low thermal conductivity, a low elasticity coefficient, low impact strength and low resistance to fatigue. this study aimed to make an in vitro comparison of the thermal conductivity, compressive strength, and tensile strength of the acrylic base of com...

This paper deals with the steady state catalytic ignition of premixed gases over a flat píate of finite thickness. An external heat flux is added to the píate to facilítate the ignition process. The influence of the finite thermal conductivity of the píate on the catalytic ignition is evaluated in the two distinct limits of the reduced Damkohler number of order of unity and much less than unity...

A description is given of an apparatus used for determining the t hermal conductivities o f solids in t he temperature range 4° K to 300° K. The apparatus is especially suited to the determination of thermal conductivity over a la rge temperature interval , enabling coverage of t he temperatures between t he normal boil ing points of liquefied gases. Illustrati ve results are given for an insul...

The loss of energy especially in industrial and residential buildings is one of the main reasons of increased energy consumption. Improving the thermal insulation properties of materials is a fundamental method for reducing the energy losses. Polymeric foams are introduced as materials with excellent thermal insulation properties for this purpose. In the present study, a deep theoretical invest...

This paper was aimed to address the modeling of effective thermal conductivity and viscosity of carbon structured nanofluids. Response surface methodology, D_optimal design (DOD) was employed to assess the main and interactive effects of temperature (T) and weight percentage (wt %) to model effective thermal conductivity and viscosity of multi wall and single wall carbon nanotube, CVD and RGO G...

High-temperature transport properties (viscosity, thermal conductivity, binary and multicomponent mass diffusion, and thermal diffusion) of dissociating gases of the Earth and Martian atmospheres have been calculated within the framework of the Chapman-Enskog method. The exponential repulsion potentials of interactions between atoms (N, 0 , and C) and molecules (N,, 0,, NO, C,, CN, CO, and CO,)...