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Obróbka wykończeniowa Inconelu 718 smarowana MQL z elektrycznie naładowanym dwusiarczkiem wolframu

100%

Jemielniak K.

tom R. 96, nr 4

Przedstawiono wyniki frezowania czołowego Inconelu 718 z zastosowaniem nowo zaprojektowanego i wykonanego systemu dostarczania minimalnej ilości smaru (MQL) w postaci elektrycznie naładowanej zawiesiny nanocząstek dwusiarczku wolframu (WS2) w oleju roślinnym.

75%

Palani G. , Arutchelvi A.

tom Vol. 28, no. 1

71--83

An analysis has been carried out to study the two-dimensional free convective boundary layer MHD nanofluid flow past an inclined plate with heat generation, chemical reaction and radiation effects under convective boundary conditions. The partial differential equations describing the flow are coupled nonlinear. They have been reduced to nonlinear ordinary differential equations by utilizing a similarity transformation, which is then solved numerically with the aid of the Runge-Kutta-based shooting technique. Graphs depict the influence of different controlling factors on the velocity, temperature, and concentration profiles. Numerical findings for skin friction, Nusselt number and Sherwood number are reviewed for distinct physical parameter values. In a limited sense, there is a good correlation between the current study's results and those of the earlier published work.

A study of MHD fluid with second order slip and thermal flow over a nonlinear stretching sheet

75%

Jauhri S. , Mishra U.

tom Vol. 27, no. 2

98--114

An electrically conducted viscous incompressible nanofluid flow caused by the nonlinear stretching surface with stagnation flow has been investigated numerically. The effect of Brownian motion and thermophoresis on the nanofluid is also incorporated. The governing partial differential equations with nonlinear second order boundary conditions are solved by the fourth order Runge-Kutta technique using MATLAB programming. The effect of the radiation parameter (Rd), stretching parameter (n), Brownian motion parameter (Nb), thermophoresis parameter (Nt) on temperature, velocity and mass transfer are shown graphically. The influence of some of these parameters on the local Nusselt number (−𝜃′(0)) and local Sherwood number (−𝜙′(0)) are shown by the graphs.

Numerical study of heating transfer by natural convection in an inclined elliptical cylinder charged with nanofluid

63%

Amroune A. , Bouras A. , Taloub D. , Driss Z.

tom Vol. 28, no. 3

28--41

In this paper, thermal transfer with natural convection in a tilted annular cylinder with a Cu-water nanofluid has been numerically studied. The hot interior and cold exterior elliptical surfaces of the enclosure were maintained at constant temperatures Th and Tc , respectively. The governing equations were solved by the stream function-vorticity approach. The finite volume approach was utilized to discretise the controlling equations. The volume fraction range of the nanoparticles and the Rayleigh number was as follows: [...] respectively. The inclination angles were γ=30°,45°,and 60°. Results were given as isotherm contours, streamlines, average and local Nusselt numbers. The results indicate that the thermal transfer ratio increases with an increase in the tilt angle, regardless of the nanoparticle size values. and the impact of the inclination angle on the heating transfer rate is more important the higher the Rayleigh number and the more convection there is.