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Shervin Khayamyan
Shervin Khayamyan

Shervin Khayamyan

Researcher
Luleå University of Technology
Fluid Mechanics
Fluid and Experimental Mechanics
Department of Engineering Sciences and Mathematics
Luleå

Research Interest

I am working with flow in porous media mostly experimentally and numerically. Porous media characterizes a complex geometry consisting of a solid phase and some interstitial space between it that define the porosity of the material. In other words any solid material which has cavities, channels or interstices can be considered a porous material. A porous medium is built from at least two phases with distinguishable boundaries between them. The complexity and variety of porous materials has therefore made the investigation of transport processes in porous media an important issue.

My primary research was about flow regimes and mechanisms behind transition from laminar to turbulent flow in porous media. Most porous media flow is in the laminar regime because the fluid velocity is small and the pore spaces are tiny resulting in lower hydraulic permeability. However, flows with high velocities are capable of being turbulent even in tiny pore spaces. Transition from laminar to turbulent flow is a slow and continuous process and the transitional Re may vary within the porous media. To study transition from laminar to turbulent flow I built two simplified models of neighboring pores and studied their interaction at different flow regimes by pressure measurements. 

Study the flow dynamics in a randomly packed bed of spheres with conventional and stereoscopic particle image velocimetry (PIV & Stereo-PIV) is my other research interest. In order to have visual access to flow field within the bed the refractive index of fluid must be matched with solid phase (RIM). The velocity field observations are done for particle Reynolds numbers between 30 and 4000 in order to cover all the possible flow regimes.

Courses

  •    Turbulence and Turbulence Modelling I
  •    Turbulent modelling II
  •     Applied Mathematics
  •     Applied Fluid Mechanics
  •     Advanced Numerics
  •     Statistical Methods and Experimental Design
  •     Viscous Flow
  •     Meshing Course
  •     CFD Course in Combustion
  •     MATLAB for Researchers
  •     Flow through porous media
  •     Modern Control Engineering
  •     Uncertainty Analysis
  •     Quality and Trust in CFD
  •     Thermodynamic I
  •     Thermodynamic II
  •      Aerodynamic
  •      Gad Dynamic
  •     Dynamic
  •     Applied Mechanics
  •     Advanced experimental techniques
  •     Computational fluid dynamics
  •     Mechanical Waves
  •     Advanced Fluid Mechanics
  •     Finite element analysis of solid structures
  •     Energy Plant and Systems Engineering     
  •     Fuels, Combustion and Gasification Technology     
  •     Advanced Heat and Mass Transfer
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