نتایج جستجو برای: nonlinear thermal radiation

تعداد نتایج: 653704  

Journal: :Scientia Iranica 2021

This paper explores the effects of thermal radiation, buoyancy force, chemical reaction, and activation energy on magnetohydrodynamic (MHD) nanofluid flow past a stretching vertical surface. The resulting nonlinear momentum, energy, solute, nanoparticle concentration boundary layer equations are simplified by transformation similarity. transformed solved numerically using shooting technique. Fo...

The present numerical attempt deals the sway to transfer of heat and mass characteristics on the time-dependent hydromagnetic boundary layer flow of a viscous fluid over an exponentially inclined preamble stretching. Furthermore, the role of viscous heating, thermal radiation, uneven energy gain or loss, velocity slip, thermal slip and solutal slips are depicted. The prevailing time-dependent P...

2012
Mikko Ahonen Tarmo Koppel

Many schools and educational institutions are using wireless Wi-Fi and Tablet technologies in their education. Recently WHO IARC classified radiofrequency (RF) radiation ‘possibly carcinogenic to humans’. Currently guidance levels for electromagnetic fields (including RF) are based on thermal effects while effects have been reported on non-thermal levels. Possibly these biological, non-thermal ...

1999
Mark J. Welch Tim Panczak

Thermal analysis is typically executed with multiple tools in a series of separate steps for performing radiation analysis, generating conduction and capacitance data, and for solving temperatures. This multitude of programs often leads to many user files that become unmanageable with their multitude, and the user often looses track as to which files go with which cases. In addition to combinin...

Background: The activity concentrations of natural radionuclides in soil around a coal-fired thermal power plant of northwest China were investigated for assessing the radioactivity level. Materials and Methods: Soil samples were collected around the coal-fired thermal power plant and their radioactivity levels were determined using gamma ray spectrometry. Radiation hazards were assessed by rad...

Journal: :Časopis pro pěstování matematiky a fysiky 1905

In this research, Ag nanoparticles were prepared by using g-radiation at concentration of 5.18×10-3 M and irradiated at different doses. A green laser was employed as excited source for measuring nonlinear refractive index and absorption coefficient. The measurements were done by z-scan method for both, closed and open aperture at temperature room. We deduced that with growth of size of Ag nano...

2013
A. F. Borghesani G. Carugno G. Ruoso

The properties of thermal emission of hot bodies is a central topic in Modern Physics [1]. The dependence of the Planck’s law only on the body temperature T but not on its material properties make pirometry a universal pyrometric technique [2]. The blackbody emission consists of unpolarized, incoherent radiation for bodies whose size is larger than the typical thermal wavelength, λT = hc/kBT, w...

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