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V. A. Kalinichenko - One of the best experts on this subject based on the ideXlab platform.

  • Suppression of Intense Fluid Oscillations by a Floating Particle Layer
    Fluid Dynamics, 2020
    Co-Authors: V. A. Kalinichenko
    Abstract:

    — The results of the experiments on the influence of a positive-buoyancy-particle layer on the process of breaking and regularization of the standing gravity Faraday wave on free water surface in a Rectangular Vessel are discussed. The effect of increase in the particle layer thickness on the limit steepness of the regular wave and its dissipative properties is considered. It is shown that the use of highly concentrated polystyrene particle suspension as the upper layer modifies significantly the barotropic wave mode dynamics and ensures regularization of the waves with total suppression of their breaking mechanisms.

  • Regularization of Barotropic Gravity Waves in a Two-Layer Fluid
    Fluid Dynamics, 2019
    Co-Authors: V. A. Kalinichenko
    Abstract:

    The results of the experiments on studying the effect of the upper layer of a viscous fluid on the process of breaking and regularization of the standing gravity Faraday wave on the free surface of a two-layer fluid in a Rectangular Vessel are discussed. The situation considered is compared with the case of standing gravity wave on the free surface of homogeneous fluids whose viscosity differs significantly, namely, water and seed oil. The effect of increase in the upper layer thickness on the limit steepness of the regular wave and its dissipative properties is considered. The crucial role of emulsion formed under intense oscillations of immiscible fluids for suppression of the standing wave breaking mechanism is demonstrated.

  • Viscous Regularization of Breaking Faraday Waves
    JETP Letters, 2018
    Co-Authors: A. V. Bazilevskii, V. A. Kalinichenko, A. N. Rozhkov
    Abstract:

    The effect of the viscosity of a liquid on the parameters of standing surface gravity waves in a vertically oscillating Rectangular Vessel has been experimentally studied. It has been shown for the first time that a 60-fold increase in the viscosity of a working medium as compared to water fundamentally changes the parameters of the second nonlinear wave mode: waves are regularized in the total absence of their breaking. The effect of viscosity on the resonance dependences and process of damping of waves has been studied. The numerical analysis of the dispersion relation for gravity waves has shown that the effects observed in the experiment are due to the presence of short-range perturbations in the cutoff region, where viscous dissipation becomes a dominant factor and short waves are suppressed.

  • Vortex-induced damping of fluid oscillations in a Rectangular Vessel
    Fluid Dynamics, 2015
    Co-Authors: V. A. Kalinichenko, A. N. Soe, Yu. D. Chashechkin
    Abstract:

    The effect of transverse damper plates on the parameters of standing surface waves in a vertically oscillating Rectangular Vessel is experimentally investigated. Using the tracer visualization methods it is shown that the damping effect of the plates mounted at the node of the standing wave is due to the wave energy transfer into the system of three-dimensional unsteady vortices throughout the entire fluid depth. The plate efficiency with respect to the variation in the mode and the frequency shift of the resonance dependences of the parametrically excited waves is qualitatively evaluated. A universal dependence of the wave decay rate on the relative blockage of the central cross-section of the Vessel is obtained.

  • Structuring of suspended sediments in periodic vortex flow over a vortex ripple
    Fluid Dynamics, 2014
    Co-Authors: V. A. Kalinichenko, Yu. D. Chashechkin
    Abstract:

    The formation of spatially ordered structures in a suspended sediment under the action of two-dimensional standing surface gravity waves is studied experimentally for the first time in a Rectangular Vessel oscillating in the vertical direction. The parameters of the structured regions in Vessels with individual vortex ripples and groups of ripples are found for the first and second wave modes. Isolated structured regions of the suspended sediment appear over the bottom topography and gradually reach the free surface. The corresponding spatial horizontal scales are determined by the sand ripple dimensions, while the vertical scale of the clouds increases with time. In all experiments, the structures formed remained unchanged during the whole interval of the fluid wave motion and disappeared when the parametric excitation of the waves stopped.

M.a. Hossain - One of the best experts on this subject based on the ideXlab platform.

  • Numerical solutions of locally magnetized blood flow in the Vessel filled with the porous medium
    International Journal of Mechanical Sciences, 2019
    Co-Authors: Sadia Siddiqa, S.b. Naqvi, M.a. Hossain
    Abstract:

    Abstract In this paper two-dimensional biofluid is simulated in the Rectangular Vessel, which is fully filled with the homogeneous porous media. Unlike the typical Navier–Stokes equations, the blood flow is governed by the principles of magnetohydrodynamics and ferrohydrodynamics. The main purpose of this study is to understand the impact of porous medium on the region where biofluid is subject to the application of localized magnetic field. The numerical results are estimated by keeping in view the applications in the field of magneto-haemorheology. Therefore, values of all the physical parameters, used for the interpretation of results, are in accordance with the pathological state. The solutions are presented in the form of vorticity function, streamlines, temperature function contours and velocity components. It is observed that the blood velocity can be controled by adjusting the isotropic permeability which is the desirable requirement of surgical treatments for hyperthermia and cancer.

  • Thermal radiation therapy of biomagnetic fluid flow in the presence of localized magnetic field
    International Journal of Thermal Sciences, 2018
    Co-Authors: Sadia Siddiqa, S.b. Naqvi, Naheed Begum, Saeed Ehsan Awan, M.a. Hossain
    Abstract:

    Abstract Present work describes the applications of magnetic field and thermal radiation on the two-dimensional, unsteady flow of bio-magnetic fluid (blood) in a Rectangular Vessel. The viscosity of the fluid is considered to be an exponential function of temperature. The radiative heat flux is approximated with the help of Stefan Boltzmann law, which is a nonlinear function of temperature. The governing nonlinear, coupled system of partial differential equations for the underlying problem is represented in terms of stream function-vorticity formulation, which is further solved numerically with the help of upwind scheme along with successive over relaxation method. For the validation of the solutions, results are compared with the numerical and experiemental data available in the literature. In order to notice the influence of localized magnetic field and thermal radiation, solutions are presented graphically in terms of streamlines, isotherms, vorticity function contours and velocity component contours and are discussed both qualitatively and quantitatively from the physiological point of view.

S. Fukusako - One of the best experts on this subject based on the ideXlab platform.

  • Freezing heat transfer in water-saturated porous media in a vertical Rectangular Vessel
    Wärme - und Stoffübertragung, 1992
    Co-Authors: A. Sasaki, S. Aiba, S. Fukusako
    Abstract:

    Numerical and experimental study is performed for the freezing of water-saturated porous media in a vertical Rectangular Vessel. The governing equations are solved by using a variable transformation and employing a finite difference scheme. The SOR method is utilized to solve numerically the equations. Different size and types of spherical beads are used as the porous media. The temperature of cold wall is kept at −10°C, while that of the hot wall is varied from 2°C to 22°C. Comparisons of the analytical results with the experimental ones are made. The effects of the Stefan number, the Darcy number, the modified Prandtl number and the ratio of the temperature of cold wall to the temperature of hot wall are discussed for freezing of the water-saturated porous media. Diese numerische und experimentelle Untersuchung das Gefrieren in mit Wasser gesättigten porösen Medien in einem vertikalen rechteckigen Behälter. Die Erhaltungsgleichungen werden mit einem Variablen-Transformations-Verfahren und einem Differenzen-Verfahren gelöst. Zur numerischen Lösung der Differentialgleichung wird die SOR Methode verwendet. Als poröses Medium wurden verschiedene Typen und Größen von kugelförmigen Perlen benutzt. Die kalte Wand wurde auf −10°C gehalten, die Temperatur der warmen Wand lag zwischen 2 und 22°C. Die errechneten Ergebnisse wurden mit den experimentell Ermittelten verglichen. Die Einflüsse der Stefan-, Darcy- und Prandtl-Zahlen sowie des Verhältnisses der Temperatur der warmen zur kalten Wand auf das Gefrieren in gesättigten porösen Medien wurden diskutiert.

  • Freezing heat transfer in water-saturated porous media in a vertical Rectangular Vessel
    Wärme- und Stoffübertragung, 1992
    Co-Authors: A. Sasaki, S. Aiba, S. Fukusako
    Abstract:

    Numerical and experimental study is performed for the freezing of water-saturated porous media in a vertical Rectangular Vessel. The governing equations are solved by using a variable transformation and employing a finite difference scheme. The SOR method is utilized to solve numerically the equations. Different size and types of spherical beads are used as the porous media. The temperature of cold wall is kept at −10°C, while that of the hot wall is varied from 2°C to 22°C. Comparisons of the analytical results with the experimental ones are made. The effects of the Stefan number, the Darcy number, the modified Prandtl number and the ratio of the temperature of cold wall to the temperature of hot wall are discussed for freezing of the water-saturated porous media.

Sadia Siddiqa - One of the best experts on this subject based on the ideXlab platform.

  • Numerical solutions of locally magnetized blood flow in the Vessel filled with the porous medium
    International Journal of Mechanical Sciences, 2019
    Co-Authors: Sadia Siddiqa, S.b. Naqvi, M.a. Hossain
    Abstract:

    Abstract In this paper two-dimensional biofluid is simulated in the Rectangular Vessel, which is fully filled with the homogeneous porous media. Unlike the typical Navier–Stokes equations, the blood flow is governed by the principles of magnetohydrodynamics and ferrohydrodynamics. The main purpose of this study is to understand the impact of porous medium on the region where biofluid is subject to the application of localized magnetic field. The numerical results are estimated by keeping in view the applications in the field of magneto-haemorheology. Therefore, values of all the physical parameters, used for the interpretation of results, are in accordance with the pathological state. The solutions are presented in the form of vorticity function, streamlines, temperature function contours and velocity components. It is observed that the blood velocity can be controled by adjusting the isotropic permeability which is the desirable requirement of surgical treatments for hyperthermia and cancer.

  • Thermal radiation therapy of biomagnetic fluid flow in the presence of localized magnetic field
    International Journal of Thermal Sciences, 2018
    Co-Authors: Sadia Siddiqa, S.b. Naqvi, Naheed Begum, Saeed Ehsan Awan, M.a. Hossain
    Abstract:

    Abstract Present work describes the applications of magnetic field and thermal radiation on the two-dimensional, unsteady flow of bio-magnetic fluid (blood) in a Rectangular Vessel. The viscosity of the fluid is considered to be an exponential function of temperature. The radiative heat flux is approximated with the help of Stefan Boltzmann law, which is a nonlinear function of temperature. The governing nonlinear, coupled system of partial differential equations for the underlying problem is represented in terms of stream function-vorticity formulation, which is further solved numerically with the help of upwind scheme along with successive over relaxation method. For the validation of the solutions, results are compared with the numerical and experiemental data available in the literature. In order to notice the influence of localized magnetic field and thermal radiation, solutions are presented graphically in terms of streamlines, isotherms, vorticity function contours and velocity component contours and are discussed both qualitatively and quantitatively from the physiological point of view.

A. Sasaki - One of the best experts on this subject based on the ideXlab platform.

  • Freezing heat transfer in water-saturated porous media in a vertical Rectangular Vessel
    Wärme - und Stoffübertragung, 1992
    Co-Authors: A. Sasaki, S. Aiba, S. Fukusako
    Abstract:

    Numerical and experimental study is performed for the freezing of water-saturated porous media in a vertical Rectangular Vessel. The governing equations are solved by using a variable transformation and employing a finite difference scheme. The SOR method is utilized to solve numerically the equations. Different size and types of spherical beads are used as the porous media. The temperature of cold wall is kept at −10°C, while that of the hot wall is varied from 2°C to 22°C. Comparisons of the analytical results with the experimental ones are made. The effects of the Stefan number, the Darcy number, the modified Prandtl number and the ratio of the temperature of cold wall to the temperature of hot wall are discussed for freezing of the water-saturated porous media. Diese numerische und experimentelle Untersuchung das Gefrieren in mit Wasser gesättigten porösen Medien in einem vertikalen rechteckigen Behälter. Die Erhaltungsgleichungen werden mit einem Variablen-Transformations-Verfahren und einem Differenzen-Verfahren gelöst. Zur numerischen Lösung der Differentialgleichung wird die SOR Methode verwendet. Als poröses Medium wurden verschiedene Typen und Größen von kugelförmigen Perlen benutzt. Die kalte Wand wurde auf −10°C gehalten, die Temperatur der warmen Wand lag zwischen 2 und 22°C. Die errechneten Ergebnisse wurden mit den experimentell Ermittelten verglichen. Die Einflüsse der Stefan-, Darcy- und Prandtl-Zahlen sowie des Verhältnisses der Temperatur der warmen zur kalten Wand auf das Gefrieren in gesättigten porösen Medien wurden diskutiert.

  • Freezing heat transfer in water-saturated porous media in a vertical Rectangular Vessel
    Wärme- und Stoffübertragung, 1992
    Co-Authors: A. Sasaki, S. Aiba, S. Fukusako
    Abstract:

    Numerical and experimental study is performed for the freezing of water-saturated porous media in a vertical Rectangular Vessel. The governing equations are solved by using a variable transformation and employing a finite difference scheme. The SOR method is utilized to solve numerically the equations. Different size and types of spherical beads are used as the porous media. The temperature of cold wall is kept at −10°C, while that of the hot wall is varied from 2°C to 22°C. Comparisons of the analytical results with the experimental ones are made. The effects of the Stefan number, the Darcy number, the modified Prandtl number and the ratio of the temperature of cold wall to the temperature of hot wall are discussed for freezing of the water-saturated porous media.