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  • 1
    Online Resource
    Online Resource
    Theoretical study of an unsteady ciliary hemodynamic fluid flow subject to the Newton’s boundary conditions
    SAGE Publications ; 2021
    In:  Advances in Mechanical Engineering Vol. 13, No. 8 ( 2021-08), p. 168781402110404-
    Details
    In: Advances in Mechanical Engineering, SAGE Publications, Vol. 13, No. 8 ( 2021-08), p. 168781402110404-
    Abstract: This article addresses the hemodynamic flow of biological fluid through a symmetric channel. Methachronal waves induced by the ciliary motion of motile structures are the main source of Couple stress nanofluid flow. Darcy’s law is incorporated in Navier-Stokes equations to highlight the influence of the porous medium. Thermal transport by the microscopic collision of particles is governed by Fourier’s law while a separate expression is obtained for net diffusion of nanoparticles by using Fick’s law. A closed-form solution is achieved of nonlinear differential equations subject to Newton’s boundary conditions. Moreover, the current findings are compared with previous outcomes for the limiting case and found a complete coherence. Parametric study reveals that nanoflow is resisted by employing Newton’s boundary conditions. Thermal profile enhancement is contributed by the viscous dissipation parameter. Finally, one infers that hemodynamic flow of non-Newtonian fluid is an effective mode of heat and mass transfer especially, in medical sciences for the rapid transport of medicines in drug therapy.
    Type of Medium: Online Resource
    ISSN: 1687-8140 , 1687-8140
    URL: Article
    DOI: 10.1177/16878140211040462
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2501620-9
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  • 2
    Online Resource
    Online Resource
    Modeling of the coupled dynamics of damping particles filled in the cells of a honeycomb sandwich plate and experimental validation
    SAGE Publications ; 2019
    In:  Journal of Vibration and Control Vol. 25, No. 11 ( 2019-06), p. 1706-1719
    Details
    In: Journal of Vibration and Control, SAGE Publications, Vol. 25, No. 11 ( 2019-06), p. 1706-1719
    Abstract: Equipment panels of a spacecraft are made up of a sandwich composite with aluminum face sheets and a honeycomb (HC) core. The HC sandwich plate responds to the launch vibration loads subjecting the equipment mounted on it to a high level of accelerations at resonances owing to a lower natural damping. Damping particles (DPs) when inserted in the empty cells of a HC core improve the damping characteristics and reduce the resonance responses. In this work, we present a mathematical model governing the motion of the cell walls, DPs and HC plate under dynamic loading. The discrete element method (DEM) has been used to model the dynamics of the DPs wherein the contacts are modeled using modified nonlinear dissipative Hertz contact theory in conjunction with Coulomb friction. The effect of DPs on the responses at resonances, damping, and frequency response function (FRF) of the HC plate is obtained. Numerical and experimental studies were conducted on a HC plate where a selected portion of the plate was filled with DPs. The HC plate was subjected to sine sweep base acceleration at the edges to study the effect of DPs on the dynamic characteristic of the plate. The damping ratios and resonance peaks of the lower four modes of the HC plate, excited up to 1000 Hz, obtained experimentally from the FRF measurements and numerically from the DEM model compare well. The damping ratios, response at resonances and the FRF profiles are also similar. Significant improvement in damping ratios and attenuation of vibration level has been observed.
    Type of Medium: Online Resource
    ISSN: 1077-5463 , 1741-2986
    URL: Article
    DOI: 10.1177/1077546319837584
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 2070247-4
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  • 3
    Online Resource
    Online Resource
    Scrutiny of entropy optimized tangent hyperbolic fluid (non-Newtonian) through perturbation and numerical methods between heated plates
    SAGE Publications ; 2020
    In:  Advances in Mechanical Engineering Vol. 12, No. 12 ( 2020-12), p. 168781402097077-
    Details
    In: Advances in Mechanical Engineering, SAGE Publications, Vol. 12, No. 12 ( 2020-12), p. 168781402097077-
    Abstract: Many methods have been used to maximize the capacity of heat transport. A constant pressure gradient or the motion of the wall can be used to increase the heat transfer rate and minimize entropy. The main goal of our investigation is to develop a mathematical model of a non-Newtonian fluid bounded within a parallel geometry. Minimization of entropy generation within the system also forms part of our objective. Method: Perturbation theory is applied to the nonlinear complex system of equations to obtain a series solution. The regular perturbation method is used to obtain analytical solutions to the resulting dimensionless nonlinear ordinary differential equations. A numerical scheme (the shooting method) is also used to validate the series solution obtained. Results: The flow and temperature of the fluid are accelerated as functions of the non-Newtonian parameter (via the power-law index). The pressure gradient parameter escalates the heat and volume flux fields. The energy loss due to entropy increases via the viscous heating parameter. A diminishing characteristic is predicted for the wall shear stress that occurs at the bottom plate versus the time-constant parameter. The Reynolds number suppresses the volume flux field.
    Type of Medium: Online Resource
    ISSN: 1687-8140 , 1687-8140
    URL: Article
    DOI: 10.1177/1687814020970772
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2020
    detail.hit.zdb_id: 2501620-9
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  • 4
    Online Resource
    Online Resource
    EXPRESS: Effects of Prehabilitation Resistance Training in Mild to Moderate Clinically Frail Patients Awaiting Coronary Artery Bypass Graft Surgery
    SAGE Publications ; 2023
    In:  Journal of Investigative Medicine
    Details
    In: Journal of Investigative Medicine, SAGE Publications
    Abstract: Coronary artery disease is one of the main cause of mortality and morbidity among chronic heart diseases worldwide. Current study was planned to compare the effects of pre-habilitation resistance training in mild to moderate clinically frail patients awaiting coronary artery bypass graft (CABG). A Randomized controlled trial was conducted on 74 patients awaiting CABG at Faisalabad Institute of Cardiology, Pakistan. Modified Healthy heart questionnaire was used for screening of the patients. Interventions applied were resistance training by using cuff weights/ dumbbells at light intensity (40–50%) of a maximum one repetition (10–15 repetitions for one to three times a day) per major muscle groups of upper and lower limbs of the body on weekly basis. Main outcome measures were 6-minute walk test (6MWT), New York heart association (NYHA) for heart failure, clinical frailty score and essential frailty toolset. Significant differences between group A and group B patients were observed. The mean ranks for 6MWT in group A and group B were 1.70 and 1.55, respectively. The mean ranks of NYHA in group A and group B were 1.68 and 2.84, respectively. While clinical frailty score in group A and group B were 2.68 and 2.74, respectively with essential frailty toolset in group A and group B were 1.14 and 1.11, respectively. There were significant (p 〈 0.05) differences within and between groups for prehabilitation resistance training after CABG. The study showed that resistance training group had improved the clinical frailty score, strength, endurance and functional capacity in patients who underwent elective CABG.
    Type of Medium: Online Resource
    ISSN: 1081-5589 , 1708-8267
    URL: Article
    DOI: 10.1177/10815589231207795
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
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