Yazar "Loganathan, K." seçeneğine göre listele

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  • Küçük Resim
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    Thermal analysis of radiative water- and glycerin-based carbon nanotubes past a Riga plate with stratification and non-Fourier heat flux theory
    (Springer, 2023) Kayıkçı, Şafak; Eswaramoorthi, S.; Postalcıoğlu, Seda; Loganathan, K.
    The impact of thermal stratification and thermally radiative flow of carbon nanotubes on a Riga plate with injection/suction and heat generation/consumption is investigated. The two varieties of base fluids, like, water and glycerin with single-wall nanotubes and multi-wall carbon nanotubes, are incorporated in this investigation. Cattaneo-Christov heat flux theory is utilized to frame the energy equation. The controlling PDEs are remodeled into ODEs using the appropriate variables. The obtained ODEs are analytically solved by applying the HAM procedure and numerically solved by using the BVP4c scheme. The consequences of the physical parameters on fluid velocity, fluid temperature, skin friction coefficients and local Nusselt number are explained through tables, graphs and charts. It is detected that the fluid velocity in both directions diminishes when raising the suction/injection and velocity slip parameters. The fluid temperature downturns when enhancing the suction/injection and stratification parameters. The surface shear stress suppresses when increasing the Forchheimer number. The radiation parameter leads to strengthening the heat transfer gradient.
  • Küçük Resim
    Öğe
    Zero and nonzero mass flux effects of bioconvective viscoelastic nanofluid over a 3D Riga surface with the swimming of gyrotactic microorganisms
    (Hindawi Ltd, 2021) Karthik, Thirumalai Sampath; Loganathan, K.; Shankar, A. N.; Carmichael, M. Jemimah; Mohan, Anand; Kayıkçı, Şafak
    This work addresses 3D bioconvective viscoelastic nanofluid flow across a heated Riga surface with nonlinear radiation, swimming microorganisms, and nanoparticles. The nanoparticles are tested with zero (passive) and nonzero (active) mass flux states along with the effect of thermophoresis and Brownian motion. The physical system is visualized via high linearity PDE systems and nondimensionalized to high linearity ordinary differential systems. The converted ordinary differential systems are solved with the aid of the homotopy analytic method (HAM). Several valuable and appropriate characteristics of related profiles are presented graphically and discussed in detail. Results of interest such as the modified Hartmann number, mixed convection parameter, bioconvection Rayleigh number, and Brownian motion parameter are discussed in terms of various profiles. The numerical coding is validated with earlier reports, and excellent agreement is observed. The microorganisms are utilized to improve the thermal conductivity of nanofluid, and this mechanism has more utilization in the oil refinery process.