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Numerical simulations of turbulent flow in an eccentric annulus of unit eccentricity
(TSFP-9, 2015)
In this study, we perform Direct Numerical Simulations (DNS) of fully developed turbulent flows in eccentric annuli having different diameter ratios. Annuli of unit eccentricity, and diameter ratios of 0.2591 and 0.1395 ...
Effect of turbulent pulsating flow around a near-wall submerged cylinder on the potential motion of bed and suspended loads
(International Society of Offshore and Polar Engineers, 2016)
In the present work, the pulsating flow around a submerged cylinder close to the impermeable seabed is examined by means of Large Eddy Simulations (LES). A Reynolds number equal to Re = 5000 is considered, based on the ...
Structure anisotropy in MHD turbulence subjected to mean shear and frame rotation
(Affiliation: Dept. of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia, CyprusAffiliation: Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, United StatesAffiliation: Center for Turbulence Research, NASA Ames Research Center, United StatesCorrespondence Address: Kassinos, S.C.Dept. of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia, Cyprusemail: kassinos@ucy.ac.cy, 2005)
We consider homogeneous turbulence in a conducting fluid that is exposed to a uniform external magnetic field while being sheared in fixed and rotating frames. We take both the frame-rotation axis and the applied magnetic ...
When structure makes a difference: Computation of rotating wall-bounded flows with an algebraic structure-based model
(Affiliation: Department of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia 1678, CyprusAffiliation: Center for Turbulence Research, Stanford University, Stanford, CA 94305, United StatesCorrespondence Address: Kassinos, S.C.Department of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia 1678, Cyprusemail: kassinos@ucy.ac.cy, 2005)
Two linear eddy-viscosity models, the ν 2-f and κ-ω models, have been combined with an algebraic structure-based algorithm for the evaluation of the Reynolds stresses. This closure was originally designed as an integral ...
Computational fluid dynamics (CFD) Simulations of aerosol deposition in the lungs
(TSFP-9, 2015)
In the current study, Large Eddy Simulations (LES) are used to investigate the transport and deposition of inhaled aerosol particles (dp = 0.1, 0.5, 1, 2.5, 5, 10 μm) in a realistic geometry of the human airways under ...
The effect of flow rate, head position, and inhaler orientation on the airflow and particle deposition in an mri-based mouth-throat geometry
(International Symposium on Turbulence and Shear Flow Phenomena, TSFP10, 2017)
The mouth-throat plays a key role in the administration of inhaled medicines. It is an area of intense filtration, where an unacceptably high fraction of the released drug dose is deposited and thus wasted. Due to the ...
Fully turbulent flow in a physiologically realistic human airway bifurcation
(TSFP-9, 2015)
Recent computational studies have shown that the airflow in the upper human airways is turbulent during much of the respiratory cycle. A feature of respiratory airflow that poses a challenge to computations based on ...
Numerical simulation of injection mold filling for semi-solid materials
(ASME, 1995)
Processing of metals and metal matrix composites in the semi-solid state is an emerging new technology and is becoming increasingly popular. This method provides several advantages over the traditional liquid state processing ...