Open Access
ARTICLE
K. Ganesh Kumar1, *, S. Manjunatha2, N. G. Rudraswamy3
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 131-146, 2020, DOI:10.32604/fdmp.2020.0152
Abstract Boundary layer flows and melting heat transfer of a Prandtl fluid over a
stretching surface in the presence of fluid particle suspensions has been investigated. The
converted set of boundary layer equations are solved numerically by RKF-45 method.
Obtained numerical results for flow and heat transfer characteristics are deliberated for
various physical parameters. Furthermore, the skin friction coefficient and Nusselt
number are also presented in Tabs. 2 and 3. It is found that the heat transfer rates are
advanced in occurrence of nonlinear radiation compered to linear radiation. Also, it is
noticed that velocity and temperature profile increases by increasing… More >
Open Access
ARTICLE
A. Aissa1, *, M. E. A. Slimani2, F. Mebarek-Oudina3, R. Fares1, A. Zaim1, L. Kolsi4, 5, M. Sahnoun1, M. E. Ganaoui6
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 147-159, 2020, DOI:10.32604/fdmp.2020.04073
Abstract In this paper, flow of slightly rarefied compressible nitrogen in microchannels
has been investigated numerically for low values of Reynolds and Mach numbers. The
2D governing equations were solved using Finite Element Method with first-order slip
boundary conditions (Comsol Multiphysics software). A validation was performed by
comparing with similar configuration from the literature. It was found that our model
can accurately predict the pressure driven flow in microchannels. Several interesting
findings are reported about the Relative pressure, longitudinal velocity, Mach number,
effect of gas rarefaction and flow rate. More >
Open Access
ARTICLE
Jiacheng Dai1, Jiegang Mou1, *, Tao Liu1
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 161-179, 2020, DOI:10.32604/fdmp.2020.06613
Abstract The automobile engine pump is an important part of the automobile cooling
system, and has a direct influence on the engine performance. Based on the SST k-ω
turbulence model, unsteady numerical simulation for an automobile engine pump with
different tip clearances was carried out by Fluent. To study the flow field characteristics
and pressure fluctuation, the characteristics of secondary flow distribution in volute are
also analyzed. The result shows that the pressure fluctuation characteristics of the flow
field show obvious periodic variation at different levels of tip clearances. The peak value
of pressure fluctuation at each monitoring point is dependent… More >
Open Access
ARTICLE
Houda Jalali1, ∗, Hassan Abbassi1
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 181-198, 2020, DOI:10.32604/fdmp.2020.07804
Abstract The addition of nanoparticles into liquid, even at low concentrations, leads to an
increase in both, dynamic viscosity and thermal conductivity. Furthermore, the increase in
temperature causes an increase in thermal conductivity and a decrease in the nanofluid
viscosity. In this context, a numerical investigation of the competition between viscosity
and thermal conductivity about their effects on heat transfer by Al2O3-water nanofluid was
conducted. A numerical study of heat transfer in a square cavity, filled with Al2O3-water
nanofluid and heated from the left side, was presented in this paper. Continuity,
momentum, and thermal energy equations are solved by the finite… More >
Open Access
ARTICLE
Mounir Kriraa1,2,*, Khalid Souhar3, Driss Achemlal4, Youssef Ait Yassine5,6, Abdelmajid Farchi1
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 199-209, 2020, DOI:10.32604/fdmp.2020.07986
Abstract In this paper, a detailed investigation of water (Pr ¼ 7:0) convection in
a chemical condenser is carried out. Two openings are located along one side of
the cavity. The Navier-Stokes equations are solved in the frame of a control
volume method using the SIMPLEC algorithm to implement adequate coupling
of pressure and velocity. Special emphasis is given to the influence of the Reynolds number, the tilt of the channel and the Rayleigh number on the convective
heat transfer. Results are presented and discussed allowing the control parameters
to span relatively wide intervals: Rayleigh number (104 ≤ Ra ≤ 5… More >
Open Access
ARTICLE
Lei Liu*, Ping Yu
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 211-224, 2020, DOI:10.32604/fdmp.2020.08168
Abstract High-flow hydraulic one-way valves in water pipes are typically used to
mitigate conditions, which would otherwise cause vibration and cavitation erosion
after long-term operation. To prevent cavitation and enhance the performance of
hydraulic one-way valves, in the present work a dedicated experimental study has
been conducted. The structural parameters relating to the pilot valve core, the
main valve core, and the through-flow section of the considered flow channel
have been changed to analyse reverse impact, and cavitation, characteristics.
The results show that the control pressure has a weak effect on the cavitation characteristics, while changes in the structural parameters can… More >
Open Access
ARTICLE
Lionel Fabian Fourie1, Lynndle Square2,*
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 225-235, 2020, DOI:10.32604/fdmp.2020.08771
Abstract A heat transfer study was conducted, in the framework of Computational Fluid Dynamics (CFD), on a Hot-Wire Chemical Vapour Deposition
(HWCVD) reactor chamber to determine a safe deposition distance for atomic
hydrogen produced by HWCVD. The objective of this study was to show the feasibility of using heat transfer simulations in determining a safe deposition distance
for deposition of this kind. All CFD simulations were set-up and solved within the
framework of the CFD packages of OpenFOAM namely; snappyHexMesh for
mesh generation, buoyantSimpleFoam and rhoSimpleFoam as the solvers and
paraView as the post-processing tool. Using a standard set of deposition… More >
Open Access
ARTICLE
Xiangli Wang1, Peiyong Ni2,*
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 237-243, 2020, DOI:10.32604/fdmp.2020.09469
（This article belongs to this Special Issue: The Progress in Building Indoor Air Quality: Indoor Airflow and Pollutant Control)
Abstract PM2.5 and formaldehyde are two main indoor pollutants potentially
threatening the health of human beings. In this paper, the concentrations of
PM2.5 and formaldehyde inside an office were measured under different conditions. The effects of temperature on the formaldehyde originating from the decoration materials, including flooring, gypsum powder, joint mixture and
corestock, were also assessed. The results show that window ventilation can produce the same PM2.5 purification as an air cleaner. The concentration of formaldehyde released from the decoration materials is highly correlated to the indoor
temperature, but it is not significantly influenced by humidity. In particular, the
percentage of… More >
Open Access
ARTICLE
Yatin Suri1, Sheikh Zahidul Islam1, *, Kirsten Stephen1, Cameron Donald1, Michael Thompson1, Mohamad Ghazi Droubi1, Mamdud Hossain1
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 245-266, 2020, DOI:10.32604/fdmp.2020.06505
（This article belongs to this Special Issue: CFD Modeling and Multiphase Flows)
Abstract This paper compares the fluid flow phenomena occurring within a fractured
reservoir for three different fracture models using computational fluid dynamics. The effect
of the fracture-matrix interface condition is studied on the pressure and velocity distribution.
The fracture models were compared based on the variation in pressure and permeability
conditions. The model was developed for isotropic and anisotropic permeability conditions.
The results suggest that the fracture aperture can have a drastic effect on fluid flow. The
porous fracture-matrix interface condition produces more realistic transport of fluids. By
increasing the permeability in the isotropic porous matrix, the pressure drop was significantly… More >
Open Access
ARTICLE
Ping Yu1, *, Chuanhui Huang1, Lei Liu1, Huafeng Guo1, Chengqiang Liu1
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 267-280, 2020, DOI:10.32604/fdmp.2020.06528
（This article belongs to this Special Issue: CFD Modeling and Multiphase Flows)
Abstract To study the heat and mass transfer characteristics of alkali metals in a
combined porous wick in high-temperature heat pipes, a three-dimensional (3-D)
numerical model is constructed by using the finite volume method, Darcy’s theory, and
the theory of local thermal equilibrium. The research finds that the pressure drop of
fluids flowing through a combined porous wick exhibits an increasing trend with
increasing flow velocity at the inlet and with decreasing permeability of the porous
media; a combined porous wick of lower porosity and permeability and larger fluid
velocity at the inlet is found to have a less uniformly distributed… More >
Open Access
ARTICLE
Yuanliang Tang1, 2, Lizhong Mu1, Ying He1, *
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 281-296, 2020, DOI:10.32604/fdmp.2020.06760
（This article belongs to this Special Issue: CFD Modeling and Multiphase Flows)
Abstract The aim of this study is to develop a model of fluid and heat transfer in a
biological tissue taking into account the exact structure of the related microvascular
network, and to analyze the influence of structural changes of such a network induced by
diabetes. A cubic region representing local skin tissue is selected as the computational
domain, which in turn includes two intravascular and extravascular sub-domains. To save
computational resources, the capillary network is reduced to a 1D pipeline model and
embedded into the extravascular region. On the basis of the immersed boundary method
(IBM) strategy, fluid and heat… More >
Open Access
ARTICLE
Yatin Suri1, Sheikh Zahidul Islam1, *, Mamdud Hossain1
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 297-337, 2020, DOI:10.32604/fdmp.2020.08421
（This article belongs to this Special Issue: CFD Modeling and Multiphase Flows)
Abstract The distribution of proppant injected in hydraulic fractures significantly affects
the fracture conductivity and well performance. The proppant transport in thin fracturing
fluid used during hydraulic fracturing in the unconventional reservoirs is considerably
different from fracturing fluids in the conventional reservoir due to the very low viscosity
and quick deposition of the proppants. This paper presents the development of a threedimensional Computational Fluid Dynamics (CFD) modelling technique for the prediction
of proppant-fluid multiphase flow in hydraulic fractures. The proposed model also simulates
the fluid leak-off behaviour from the fracture wall. The Euler-Granular and CFD-Discrete
Element Method (CFD-DEM) multiphase modelling approach… More >
Open Access
ARTICLE
Xiaoya Feng1, 2, Wei Luo1, 2, *, Yu Lei3, Yubin Su4, Zhigang Fang3
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 339-358, 2020, DOI:10.32604/fdmp.2020.08564
（This article belongs to this Special Issue: CFD Modeling and Multiphase Flows)
Abstract Gas-liquid two-phase flow is ubiquitous in the process of oil and gas exploitation,
gathering and transportation. Flow pattern, liquid holdup and pressure drop are important
parameters in the process of gas-liquid two-phase flow, which are closely related to the
smooth passage of the two-phase fluid in the pipe section. Although Mukherjee, Barnea
and others have studied the conventional viscous gas-liquid two-phase flow for a long time
at home and abroad, the overall experimental scope is not comprehensive enough and
the early experimental conditions are limited. Therefore, there is still a lack of systematic
experimental research and wellbore pressure for gas-liquid… More >
Open Access
ARTICLE
Matthieu Ancellin1, *, Laurent Brosset2, Jean-Michel Ghidaglia1
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 359-381, 2020, DOI:10.32604/fdmp.2020.08642
（This article belongs to this Special Issue: CFD Modeling and Multiphase Flows)
Abstract Numerous models have been proposed in the literature to include phase change
into numerical simulations of two-phase flows. This review paper presents the modeling
options that have been taken in order to obtain a model for violent separated flows with
application to sloshing wave impacts. A relaxation model based on linear non-equilibrium
thermodynamics has been chosen to compute the rate of phase change. The integration in
the system of partial differential equations is done through a non-conservative advection
term. For each of these modelling choices, some alternative models from the literature
are presented and discussed. The theoretical framework for all… More >
Open Access
ARTICLE
Lennon Ó Náraigh1, *, Daniel R. Jansen van Vuuren2
FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 383-410, 2020, DOI:10.32604/fdmp.2020.09265
（This article belongs to this Special Issue: CFD Modeling and Multiphase Flows)
Abstract In this article we use analytical and numerical modeling to describe parallel
viscous two-phase flows in microchannels. The focus is on idealized two-dimensional
geometries, with a view to validating the various methodologies for future work in three
dimensions. In the first instance, we use analytical Orr-Sommerfeld theory to describe
the linear instability which governs the formation of small-amplitude waves in such
systems. We then compare the results of this analysis with an in-house Computational Fluid
Dynamics (CFD) solver called TPLS. Excellent agreement between the theoretical analysis
and TPLS is obtained in the regime of small-amplitude waves. We continue the numerical… More >
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