نتایج جستجو برای: dufour number

تعداد نتایج: 1168848  

Journal: :Mathematical and computational applications 2022

The phenomenon of convective flow with heat and mass transfer has been studied extensively due to its applications in various fields. effects nonlinear thermal radiation (NLTR), slip, thermal-diffusion (Soret) diffusion-thermo (Dufour) on magenoto-hydrodynamic (MHD) towards a stretching cylinder the presence triple stratification (TSF) are investigated this paper. governing equations transforme...

2011
M. U. Ahammad

In the present approach, a two-dimensional steady MHD free convection flow and mass transfer over a stretching sheet has been analyzed numerically including the Dufour and Soret effects with a magnetic field. The governing differential equations of the problem have been transformed into a system of non-dimensional differential equations, which are then solved numerically using a sixth-order Run...

2014
Ime Jimmy Uwanta Halima Usman

The present paper investigates the combined effects of Soret and Dufour on free convective heat and mass transfer on the unsteady one-dimensional boundary layer flow over a vertical channel in the presence of viscous dissipation and constant suction. The governing partial differential equations are solved numerically using the implicit Crank-Nicolson method. The velocity, temperature, and conce...

2009
R. Bhargava R. Sharma

The effects of thermo-diffusion (Soret effect) and diffuso-thermal gradients (Dufour effect) on the unsteady incompressible magneto-hydrodynamic (MHD) free convection flow with mass transfer past a semi-infinite vertical plate in a Darcian porous medium in the presence of significant thermal radiation, first order homogenous chemical reaction and viscous heating are analyzed. The governing diff...

2017
F.M. Abbasi S.A. Shehzad

The primary theme of this communication is to employ convective condition of mass transfer in the theory of peristalsis. The magnetohydrodynamic (MHD) peristaltic transport of viscous liquid in an asymmetric channel was considered for this purpose. Effects of Ohmic heating and Soret and Dufour are presented. The governing mathematical model was expressed in terms of closed form solution express...

2004
J. DUFOUR J. FOOS J. P. MILLOT

A search for the products of fusion reactions that could be triggered by sparking in hydrogen isotopes was carried out. No signatures above background were found. On the contrary, the excess energy production was confirmed in the simple hydrogen/palladium system. The formation of a tightly bound state of the hydrogen (deuterium) atom is hypothesized to explain these results.

2017
Tasawar Hayat Hina Zahir Anum Tanveer Ahmad Alsaedi

The purpose of present article is to examine the peristaltic flow of Jeffrey fluid in a curved channel. An electrically conducting fluid in the presence of radial applied magnetic field is considered. Analysis of heat and mass transfer is carried out. More generalized realistic constraints namely the convective conditions are utilized. Soret and Dufour effects are retained. Problems formulation...

2013
Sharidan Shafie

In this paper, the unsteady magnetohydrodynamics (MHD) free convection flow of an incompressible and electrically conduction fluid over a stretching surface under the influence of Soret and Dufour effects with thermophresis has been investigated. The governing equations are solved numerically by using implicit finitedifference scheme. The results of skin friction, the Nusselt number and the She...

Journal: :Archives of insect biochemistry and physiology 2006
E David Morgan Sarah J Keegans Johan Billen

Minor workers of the ant Zacryptocerus pusillus have unusual exocrine secretions in both their mandibular and Dufour glands. The mandibular glands contain a 3:1 mixture of 4-heptanone and 4-heptanol, a mixture found only in the related species Z. varians. The Dufour gland contains a mixture of 13 aldehydes from C9 to C18, not previously encountered in ant secretions. The venom glands gave varia...

2007
Hugo Torres-Contreras Hermann M. Niemeyer

Several North American species of Pogonomyrmex harvester ants exhibit group foraging, whereas South American species are exclusively solitary foragers. The composition of the secretions of the poison and Dufour glands in the South American species, Pogonomyrmex vermiculatus, were analyzed, and the secretions and their components were tested as trail pheromones in laboratory bioassays. The major...

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