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Jee Hann Ng

Jee Hann Ng

Research Intern

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location of Jee Hann NgSingapore

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  • Timeline

  • About me

    Research Scientist at National University of Singapore

  • Education

    • Sekolah Menengah Kebangsaan Taman S.E.A.

      2006 - 2007
      Malaysian Higher School Certificate (STPM) Physics, Chemistry, Mathematics T, General Paper Straight A's

    • National University of Singapore

      2012 - 2016
      Doctor of Philosophy (Ph.D.) Fluid Mechanics, Mechanical Engineering

      Title: Interaction Dynamics of Structured Surface Pattern for Viscous Drag ReductionThis dissertation discusses about the behavior of fluid flowing on a solid wall having a certain structured surface pattern known as riblets. The computational study using a high order spectral element flow solver (Nek5000) demonstrates that the interactions between the overlying fluid and the riblets can result in a few flow phenomena that affect the wall shear stress distribution. Varying the groove size… Show more Title: Interaction Dynamics of Structured Surface Pattern for Viscous Drag ReductionThis dissertation discusses about the behavior of fluid flowing on a solid wall having a certain structured surface pattern known as riblets. The computational study using a high order spectral element flow solver (Nek5000) demonstrates that the interactions between the overlying fluid and the riblets can result in a few flow phenomena that affect the wall shear stress distribution. Varying the groove size and shape separately regulates the interactions and in turn the wall shear stress. In particular, a change in the shape can have a rather significant effect on the flow field within the groove, and the overall flow topology on the riblet wall. Lastly, a numerical study is designed by incorporating a riblet-like surface in a Taylor-Couette setup to examine the impact of vortex motions in the form of secondary vortices and taylor vortices on the torque generation. Show less

    • National University of Singapore

      2008 - 2012
      Bachelor of Engineering (B.Eng.) Major in Mechanical Engineering, Minor in Management (Technology) First Class Honours

  • Experience

    • Data Storage Institute

      May 2011 - Jul 2011
      Research Intern

      Computational research of fluid dynamics bearings in hard drives.Development of a flow solver using the Finite Difference Method on Matlab.Demonstration of a flow solver's performance through the simulation of flow on a spiral groove bearing.

    • Temasek Laboratories @ NUS

      May 2012 - Aug 2012
      Research Assistant

      Wind tunnel study of Dielectric Barrier Discharge (DBD) plasma actuator for aerodynamics flow control.Design and fabrication of a circular cylinder model fitted with DBD plasma actuators to assess the efficacy of the plasma actuator in suppressing flow separation downstream of a cylinder. Presented at 51st AIAA Aerospace Sciences Meeting.Design and fabrication of a circular cylinder model for the calibration of a pressure transducer system.

    • National University of Singapore

      Aug 2012 - Jul 2016
      Graduate Student Tutor

      Exposed undergraduate students to the use of SolidWorks software for mechanical engineering design.Conducted tutorial sessions on solid modeling, assembly and preparing engineering drawings with the aid of SolidWorks.Graded tutorial submissions and helped in coordinating module assessments on engineering drawing principles, tolerances, engineering conventions and representations.

    • National University of Singapore

      Oct 2016 - now

      The research project aims to set up an efficient and reliable numerical framework to investigate turbulent drag reduction using an array of shallow dimples. The numerical framework employs a wall-resolved Large-eddy simulation (LES) approach coupled with a high order spectral element flow solver to produce high-fidelity simulation data over a reasonable range of flow Reynolds number. The simulations have been successful in reproducing the qualitative trend of percentage drag reduction against flow Reynolds number measured in the earlier experiments. Direct numerical simulations (DNS) are also performed to elucidate the intricate effects of dimple geometry on near-wall turbulence activities. Show less

      • Senior Research Scientist

        Jun 2024 - now

      • Research Scientist

        Jan 2019 - Jun 2024

      • Research Fellow

        Oct 2016 - Dec 2018

  • Licenses & Certifications

    • Certified SolidWorks Associate

      Dassault Systèmes
      Mar 2015

    • Certified SolidWorks Professional

      Dassault Systèmes
      Oct 2016