Yazar "Darici, Selcuk" seçeneğine göre listele

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    Experimental investigation of convective drying kinetics of kiwi under different conditions
    (SPRINGER, 2015) Darici, Selcuk; Sen, Soner
    The effects of air temperature, velocity and humidity on drying characteristics of kiwi are experimentally investigated for the temperatures in the range of 50-80 A degrees C, of the velocities 0.5-2.0 m/s, of the relative humidity values of 5-20 % and for two slice thicknesses. It is observed that there is a very close agreement between the model of Midilli et al. (Dry Technol 20:1503-1513, 2002) and the present study with coefficients of correlation R-2 of 0.9949-0.9996.
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    Transient conjugate heat transfer in a circular microchannel involving rarefaction, viscous dissipation and axial conduction effects
    (PERGAMON-ELSEVIER SCIENCE LTD, 2017) Sen, Soner; Darici, Selcuk
    Transient conjugate heat transfer of a hydrodynamically developed and thermally developing laminar flow in a circular microchannel is investigated considering the effects of rarefaction, viscous dissipation and axial conduction. The problem is solved numerically by a finite difference method based on Patankar's (1980) control volume approach. Momentum and energy equations are solved with the boundary conditions of the first degree velocity slip and temperature jump. The problem depends on four parameters. These are the Peclet number (Pe), the Knudsen number (Kn), the Brinkman number (Br) and the wall thickness ratio (d'). The results obtained showed that heat transfer characteristics are significantly affected by these parameters and that in micro channel flows, the fluid's rarefaction effects, viscous dissipation and axial conduction should not be ignored. (C) 2016 Elsevier Ltd. All rights reserved.
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    Transient conjugated heat transfer for simultaneously developing laminar flow in thick walled pipes and minipipes
    (PERGAMON-ELSEVIER SCIENCE LTD, 2015) Darici, Selcuk; Bilir, Sefik; Ates, Ali
    Transient conjugated heat transfer in simultaneously developing laminar pipe flow is analyzed involving two-dimensional wall and fluid axial conduction. The problem is solved numerically by a finite difference method in a thick walled semi-infinite pipe which is initially isothermal, with hydrodynamically and thermally developing flow and with a sudden change in the ambient temperature. A parametric study is done to analyze the effects of six parameters, namely, wall thickness ratio, wall-to-fluid thermal conductivity ratio, wall-to-fluid thermal diffusivity ratio, the Peclet number, the Biot number and the Prandtl number. Heat transfer characteristics are seen to be highly affected by the parameter values. (C) 2014 Elsevier Ltd. All rights reserved.
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    Unsteady conjugated heat transfer in thick walled pipes involving two-dimensional wall and axial fluid conduction with uniform heat flux boundary condition
    (PERGAMON-ELSEVIER SCIENCE LTD, 2010) Ates, Ali; Darici, Selcuk; Bilir, Sefik
    Transient conjugated heat transfer in thick walled pipes for thermally developing laminar flow is investigated involving two-dimensional wall and axial fluid conduction. The problem is solved numerically by a finite-difference method for hydrodynamically developed flow in a two-regional pipe, initially isothermal in which the upstream region is insulated and the downstream region is subjected to a suddenly applied uniform heat flux. A parametric study is done to analyze the effects of four defining parameters namely, wall thickness ratio, wall-to-fluid thermal conductivity ratio, wall-to-fluid thermal diffusivity ratio and the Peclet number. The results are given by non-dimensional interfacial heat flux values, and it is observed that, heat transfer characteristics are strongly dependent on the parameter values. (C) 2010 Elsevier Ltd. All rights reserved.