Mohammad Hadi Sedaghat- Ph.D
- Postdoctoral Research Associate at University of Cyprus
Mohammad Hadi Sedaghat
- Ph.D
- Postdoctoral Research Associate at University of Cyprus
About
23
Publications
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Introduction
Current institution
Publications
Publications (23)
In this study three-dimensional (3D) numerical simulation of mucociliary clearance from the lung has been studied. The major thrust of this investigation is 3D simulation of mucociliary clearance accounting for non-linear viscoelastic characteristics of the mucus layer which is one of the most complex fluids in our body. Using a numerical code, thr...
Background: Inhalation and deposition of particles in human airways have attracted considerable attention due to importance of particulate pollutants, transmission of infectious diseases, and therapeutic delivery of drugs at targeted areas. We summarize current state-of-the art research in particle deposition on airway surface liquid (ASL) influenc...
In this study, we implemented a two-dimensional unsteady flow model to study mucociliary clearance. The model is defined in a two-layered geometry consisting of a Newtonian periciliary layer (PCL) and a nonlinear viscoelastic mucus layer that make up the airway surface liquid (ASL). The mucus property is modeled using a 5-mode nonlinear Giesekus co...
Introduction: Velopharynx, due to its relatively small cross-section area, is prone to obstruction and causing obstructive sleep apnea/hypopnea syndrome (OSAHS); thus, studying this region is of great importance. Uvulopalatopharyngoplasty (UPPP) is a surgical procedure to treat OSAHS, and is performed in the velopharynx region that entails the remo...
The conversion of renewable hydrogen to methanol as energy carrier could be a key solution to reduce CO2 emissions from fossil fuels and deal with the climate change. In the present study a steady-state Computational Fluid Dynamics (CFD) model has been employed to simulate packed bed reactor for methanol production from natural gas to predict the b...
Introduction: Velopharynx, due to its relatively small cross-section area, is prone to obstruction and causing obstructive sleep apnea/hypopnea syndrome (OSAHS); thus, studying this region is of great importance. Uvulopalatopharyngoplasty (UPPP) is a surgical procedure to treat OSAHS, and is performed in the velopharynx region that entails the remo...
CuO/ZnO/Al2O3 catalyst is commercially employed for methanol manufacturing. The push to enhance the production capacity and reduce CO2 emissions is stimulated by commercial and environmental considerations. Provided that, the present study addressed the assessment of methanol production from the collected CO2-rich off-gas streams in a petrochemical...
Background: The airway surface liquid (ASL), which is a fluid layer coating the
interior epithelial surface of the bronchi and bronchiolesis, plays an important defensive
role against foreign particles and chemicals entering lungs.
Objective: Numerical investigation has been employed to solve two-layer model
consisting of mucus layer as a viscoelas...
Numerical simulation based on immersed boundary-lattice Boltzmann method has been employed to study 2D muco-ciliary transport problem. The periciliary liquid (PCL) and mucus layers in this study are considered as the Newtonian and viscoelastic fluid respectively. An Oldroyd-B model is used as the constitutive equations of mucus layer. To simulate a...
A two dimensional numerical model is used to study the muco-ciliary transport process in human respiratory tract. Here, hybrid finite difference-lattice Boltzmann method is used to model the flow physics of the transport of mucus and periciliary liquid (PCL) layer in the airway surface liquid. The immersed boundary method is also used to implement...
In this paper, instability in the creeping viscoelastic flow between the rotating cylinders is investigated numerically. Due to the low speed of flow field, the second order fluid (SOF) model is used as the constitutive equation and the governing equations are solved by a second order finite difference method based on the artificial compressibility...
A steady two-dimensional laminar natural convection heat transfer from a cold single horizontal isothermal cylinder enclosed between two adiabatic walls is studied both experimentally and numerically. Experiments are performed to study the effects of cylinder distance from horizontal and vertical walls for Rayleigh numbers of 3 × 105 and 6 × 105. N...
In this paper, the effect of normal stress differences on the viscoelastic Taylor-Couette instability is studied numerically. The governing equations are discretized using FTCS finite difference method on a staggered mesh based on the artificial compressibility algorithm. Using the CEF model as the constitutive equation and the Carreau-Yasuda model...
In this paper, an exact analytical solution for fully developed convective heat transfer in equilateral triangular ducts under constant heat flux at the walls is presented. The previous studies have been performed using numerical methods and to the knowledge of authors, this study is the first EXACT analytical solution about the heat convection in...
In this paper, a new analytical solution for viscoelastic flow in curved elliptical pipes is presented for the first time. The perturbation method is used to derive the analytical solution, and the curvature ratio is considered as the perturbation parameter. The Oldroyd-B model is used as the constitutive equation, so the result of the present stud...
