The Journal is intended to cover some "frontier" aspects of materials science and, in particular, the most modern and advanced processes for the production of inorganic (semiconductors and metal alloys), organic (protein crystals) materials and "living" (in vitro) biological tissues, with emphasis on the fluid-dynamic conditions under which they are operated. The Journal focuses on the final properties of these materials as well as on fluid-mechanical aspects pertaining to the technological processes used to grow them. Some attention is devoted as well to all those problems of “structure/fluid” interaction that have extensive background applications in important fields such as marine, aeronautical and aerospace engineering.
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Open Access
ARTICLE
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2761-2775, 2023, DOI:10.32604/fdmp.2023.021175
(This article belongs to this Special Issue: EFD and Heat Transfer IV)
Abstract The main objective of this study is the technical optimization of a Shell-and-Tube Heat Exchanger (STHE). In
order to do so, a simulation model is introduced that takes into account the related gas-phase circulation. Then,
simulation verification experiments are designed in order to validate the model. The results show that the temperature field undergoes strong variations in time when an inlet wind speed of 6 m/s is considered, while the heat
transfer error reaches a minimum of 5.1%. For an inlet velocity of 9 m/s, the heat transfer drops to the lowest
point, while the heat transfer error reaches a… More >
Open Access
ARTICLE
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2777-2790, 2023, DOI:10.32604/fdmp.2023.021907
(This article belongs to this Special Issue: EFD and Heat Transfer IV)
Abstract The development of thermal stress in the exhaust manifold of a gasoline engine is considered. The problem is
addresses in the frame of a combined approach where fluid and structure are coupled using the GT-POWER
and STAR-CCM+ software. First, the external characteristic curve of the engine is compared with a one-dimensional simulation model, then the parameters of the model are modified until the curve matches the available
experimental values. GT-POWER is then used to transfer the inlet boundary data under transient conditions
to STAR-CCM+ in real-time. The temperature profiles of the inner and outer walls of the exhaust manifold
are… More >
Open Access
ARTICLE
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2791-2812, 2023, DOI:10.32604/fdmp.2023.029692
Abstract Iron ore sintering is a pre-treatment technology by which ore fines are converted into porous and permeable sinters, which are the used in blast furnaces. This process can be adversely affected by air leakage phenomena of
various types. As experimental measurements are relatively difficult and often scarcely reliable, here a theoretical
model based on typical fluid-dynamic concepts and relationships is elaborated. Through the analysis of two
extreme cases, namely, those in which leakage is due to a small hole or a full rupture, a generalized hole-bed model is introduced, which for the first time also includes a complete bed permeability… More >
Graphic Abstract
Open Access
ARTICLE
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2813-2825, 2023, DOI:10.32604/fdmp.2023.026190
Abstract The flow behavior of shale gas horizontal wells is relatively complex, and this should be regarded as the main
reason for which conventional pipe flow models are not suitable to describe the related dynamics. In this study,
numerical simulations have been conducted to determine the gas-liquid distribution in these wells. In particular,
using the measured flow pressure data related to 97 groups of shale gas wells as a basis, 9 distinct pipe flow models
have been assessed, and the models displaying a high calculation accuracy for different water-gas ratio (WGR)
ranges have been identified. The results show that: (1) The… More >
Open Access
ARTICLE
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2827-2835, 2023, DOI:10.32604/fdmp.2023.027746
(This article belongs to this Special Issue: Recent advancements in thermal fluid flow applications)
Abstract Solvents are generally used to reduce the viscosity of heavy crude oil and ultimately enhance oil recovery.
Recently, a new method has been introduced where nanoparticles (NPs) are exploited to induce enhanced oil
recovery owing to their ability to improve the mobility ratio, dampen the interfacial tension, and alter rock wettability. This study investigated the integration of nano-alumina (Al2O3) NPs with an n-hexane solvent. In particular, a Brookfield viscometer has been used to measure the crude oil viscosity and it has been found that NPs can
effectively lead to a significant decrease in the overall oil viscosity (70 cp using… More >
Open Access
ARTICLE
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2837-2845, 2023, DOI:10.32604/fdmp.2023.028805
(This article belongs to this Special Issue: Fluid Flow and Materials Strength related to the Wellbore Safety)
Abstract Organic rich dark shale of Q Formation can be found in many areas (e.g., in the North of S Basin). The shale
target stratum is easy to hydrate and often undergoes spallation. Therefore, centering the casing in the horizontal
section of the irregular borehole is relatively difficult. Similarly, achieving a good cement flushing efficiency under
complex borehole conditions is a complex task. Through technologies such as centralizer, efficient preflushing,
multi-stage flushing and ductile cement slurry, better performances can be achieved. In this study, it is shown
that the cementing rate in the DY2H horizontal section is 97.8%, which is more… More >
Open Access
ARTICLE
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2847-2861, 2023, DOI:10.32604/fdmp.2023.028874
Abstract To improve the performances of diesel engines and to reduce the pollutants they emit, aluminum oxide nanoparticles in varying quantities (50, 100, 150 ppm) have been added to conventional diesel fuel. The results of such
experimental tests have revealed that the addition of nano-Al2O3 particles to the diesel fuel reduces its consumption by 0.488%, 1.02%, and 1.377%, respectively and increases the brake thermal efficiency by 1.4%, 2.6%, and
3.8%, respectively. The concentrations of undesired gases decrease accordingly by 1.5%, 1.7%, and 2.8% for
HC and by 5.88%, 11.7%, and 17.6%, respectively, for CO. For the same percentages of nanoparticles, NOx… More >
Open Access
ARTICLE
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2863-2875, 2023, DOI:10.32604/fdmp.2023.029049
(This article belongs to this Special Issue: Recent advancements in thermal fluid flow applications)
Abstract The cooling of a (pebble bed) spent fuel in a high-temperature gas-cooled reactor (HTGR) is adversely affected by
an increase in the temperature of the used gas (air). To investigate this problem, a configuration consisting of
three copper spheres arranged in tandem subjected to a forced mist flow inside a cylindrical channel is considered.
The heat transfer coefficients and related variations as a function of Reynolds number are investigated accordingly. The experimental results show that when compared to those with only airflow, the heat transfer coefficient
of the spherical elements with mist flow (j = 112 kg/m2 hr, Re =… More >
Open Access
ARTICLE
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2877-2890, 2023, DOI:10.32604/fdmp.2023.029206
(This article belongs to this Special Issue: Fluid Flow and Materials Strength related to the Wellbore Safety)
Abstract Drill cuttings are broken bits of solid material removed from a borehole drilled by rotary, percussion, or auger
methods and brought to the surface in the drilling mud. When these cuttings enter the annulus, they have an
effect on the drilling fluid rheology and density, which is, in general, quite difficult to evaluate. By introducing
an empirical correlation for the rheological properties of cuttings-laden drilling fluids, this study proposes a pressure-loss prediction method for an extended-reach well (ERW). After verifying the accuracy of this method, a case
study is considered and a sensitivity analysis is conducted assuming a yield-power law… More >
Open Access
ARTICLE
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2891-2905, 2023, DOI:10.32604/fdmp.2023.029243
Abstract The properties of droplets produced by existing on-demand injection systems are typically determined by the
nozzle diameter, i.e., only droplets with size larger than this diameter can be obtained. To solve this problem,
a system for electric field-driven droplet injection and deposition was developed, and the related performances
were compared with those of a standard pneumatic system. The results show that the diameter of droplets generated accordingly can be significantly smaller than the nozzle diameter. In particular, the effects of frequency and
duty ratio on the number of droplets were studied by assuming microcrystalline wax as work material. A deposition… More >
Graphic Abstract
Open Access
ARTICLE
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2907-2921, 2023, DOI:10.32604/fdmp.2023.029304
Abstract Cementing carbonate reservoirs is generally a difficult task. The so-called thixotropic cement slurry has gained
considerable attention in this regard as it can help to fix some notable problems. More precisely, it can easily fill
the leakage layer; moreover, its gelling strength can grow rapidly when pumping stops, thereby increasing the
resistance to gas channeling, effectively preventing this undesired phenomenon in many cases. High-temperature
thixotropic cement slurry systems, however, are still in an early stage of development and additional research is
needed to make them a viable option. In the present study, using a self-developed composite high-temperature
thixotropic additive as… More >
Open Access
ARTICLE
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2923-2932, 2023, DOI:10.32604/fdmp.2023.028740
Abstract In typical metal foundry applications, sand casting is still the most used technology. The related binder plays a
very important role as its performances can directly influence the quality of castings. Among many binders, glues
of animal origin have attracted much attention in recent years due to their reduced environmental impact. However, they display some drawbacks such as the tendency to coagulate easily at room temperature and a relatively
low strength. In this study, a novel gas-hardening casting binder was prepared using an animal glue and anhydrous potassium carbonate as a hydrolyzing agent to avoid undesired agglomeration. Moreover, sodium pyrophosphate… More >
Open Access
ARTICLE
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2933-2951, 2023, DOI:10.32604/fdmp.2023.028804
(This article belongs to this Special Issue: Recent Advances in Fluid Mechanics and Thermal Sciences II)
Abstract Multiphase simulations based on the VOF (Volume of Fluid) approach, used in synergy with the cavitation
Schnerr-Sauer method and the K-Epsilon turbulence model, have been conducted to study the behavior of an
injector nozzle as a function of relevant structural parameters (such as the spray hole diameter and length).
The related performances have been optimized in the framework of orthogonal experimental design and range
analysis methods. As made evident by the results, as the spray hole diameter increases from 0.10 to 0.20 mm,
the outlet mass flow rate grows by 243.23%. A small diameter of the spray hole, however, has… More >