Nor Ashikin Abu Bakar
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Nor Ashikin Abu Bakar
Official Name
Nor Ashikin, Abu Bakar
Alternative Name
Bakar, N. A.A.
Bakar, Nor Ashikin Abu
Abu Bakar, N.
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Scopus Author ID
56286797000
Researcher ID
AAM-1480-2021

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  • Publication
    Nanofluid stagnation-point flow using Tiwari and Das model over a stretching/shrinking sheet with suction and slip effects
    ( 2020-01-01)
    Yashkun, Ubaidullah
    ;
    Wan Mohd Khairy Adly Wan Zaimi
    ;
    Nor Ashikin Abu Bakar
    ;
    Ferdows M.
    In this paper, we considered the stagnation point flow and heat transfer of nanofluid over the stretching/shrinking surface by utilizing of Tiwari and Das nanofluid model. Additionally, the impact of suction and the first order slip likewise have been taken into the account. The system of governing partial differential equations (PDEs) is changed into the system of non-linear ordinary differential equations (ODEs) by means of similarity transformation. The resultant ODEs are solved by using BVP solver (bvp4c) in MATLAB software. The impact of some physical parameters, for example the suction parameter and the slip parameter on the skin friction coefficients and the local Nusselt number as well as the temperature and velocity profiles have been investigated, tabulated and graphically presented. These profiles and variations demonstrate that there exist dual solutions for a specific range of the stretching/shrinking parameter. Both suction and slip effects has enhance the local Nusselt number which represent heat transfer rate at the surface. It is also found that inclusion of both suction and slip effects expands the range of the dual solutions exist. The existence of the dual solutions only occurs in in the shrinking region. The flow separation in the boundary layer delay due to suction and slip effects imposed in the boundary condition.
  • Publication
    Dual solutions of boundary layer flow and heat transfer in hybrid nanofluid over a stretching/shrinking cylinder
    (Semarak Ilmu Publishing, 2023)
    Nor Ashikin Abu Bakar
    ;
    Rohana Abdul Hamid
    ;
    Najwa Najib
    The boundary layer flow over a stretching/shrinking cylinder in hybrid nanofluid with the effects of suction, partial slip and convective boundary condition is studied. Hybrid nanoparticles Al2O3 and TiO2 with water as based fluid are considered in the study. The partial differential equations are transformed to ordinary differential equations by employing the similarity variables. The numerical results are obtained using the bvp4c solver in MATLAB software. The influence of nanoparticles volume fraction (Al2O3-TiO2 in water-based fluid), curvature parameter, suction parameter, partial slip parameter and Biot number on the velocity profile, temperature profile, skin friction coefficient and heat transfer rate are discussed. The numerical results indicate that for shrinking surface case, the dual solutions exist for a certain range of curvature parameter and suction parameter.