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39 articles for “the above of the fluid surface air”
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Theoretical and Experimental Research of Phenomena Arising in a Vessel Containing the Bubbles Dissolved in the Fluid and the Air above Surface of Fluid under Impact of Vibration in the Acoustic Range both in the Terrestrial and Decreasing Acceleration of Gravity Conditions
Abstract: Under terrestrial conditions, gravitational forces prevent to obtain materials that are homogeneous in distribution components and phases. Strong thermo gravitational unsteady convection leads to instability of crystals growth parameters and limits the possibilities of obtaining the crystals with a high degree of homogeneity and perfect parity structures. The first results of crystals growth in microgravity showed the fundamental possibility of producing more advanced crystals due to the absence of gravitational …
Published in Journal of Aerospace Engineering & Technology · Vol. 11, Issue 1, 2021 · pp. 48–63 Read article
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The Advanced Foam Materials Production in Microgravity using the Process of Vibroturbulization
Abstract: Recently, the task of the intensification of the existing technological processes using the intensivemixing of different environment, which are characterized by different densities (water + gas, water +solid particles + gas, water + oil so forth) is actual. The conducted studies determined that at acertain frequency and vibration acceleration of vibration, a resonant phenomenon occurs—vibroturbulization, in which the above of the fluid surface air in a vibrating vessel with fluid …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 12, Issue 1, 2021 · pp. 34–47 Read article
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Solving Problems Arising during the Monocrystals Growth in Microgravity Using Controlled Vibration
Abstract: Earlier studies of the vibration effect on a vessel with a fluid with gas bubbles dissolved in it permitted to establish the localization and stable position of the "swarm" of gas bubbles at a certain level of fluid in the vessel, corresponding to a certain frequency and vibration acceleration, as well as the volume of the "swarm" of gas bubbles. Controlling the "swarm" of gas bubbles in a fluid by …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 10, Issue 1, 2021 · pp. 25–40 Read article
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Stable control of the motion of gas bubbles dissolved in a vibrating fluid in microgravity conditions
Abstract: Previous theoretical and experimental studies of the effect of vibration on gas bubbles, dissolved in a fluid, permitted to establish the localization and stable position of a “swarm” of gas bubbles at a certain level of fluid in the vessel corresponding to a certain frequency and vibration acceleration, aswell as to the volume of a swarm of gas bubbles. The control of a “swarm“ of gas bubbles in a fluid …
Published in Recent Trends in Fluid Mechanics · Vol. 8, Issue 1, 2021 · pp. 34–44 Read article
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Review an analysis of Fluid Flow and its Dynamics Study
Abstract: Fluid dynamics is the study of liquid and gas flow, usually on and near solid surfaces. For instance, airflow over an aeroplane wing or over the surface of an automobile can be studied using fluid dynamics. Additionally, it can be utilised in ship design to speed up how quickly they move through water.To understand fluid dynamics, scientists employ both mathematical models and simulations as well as experiments. In a confined …
Published in Recent Trends in Fluid Mechanics · Vol. 9, Issue 2, 2022 · pp. 50–53 Read article
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Recent Developments in Solar Photovoltaics and Thermal Hybrid Technology
Abstract: The electrical performance of solar PV panel decreases with increase in the panel/module temperature which is cause of concern in the summer season. To decrease the effect on electrical performance due to increase in module temperature, heat is extracted from the module and used as thermal energy. Heat exchanger or heat extraction device is put on the rear surface of the PV panel and working fluid or coolant is flowed …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 6, Issue 1, 2015 · pp. 14–34 Read article
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Effect of Various Dielectric Fluids on Performance of EDM: A Review
Abstract: In electrical discharge machining (EDM), material removal takes place by means of successive electrical discharges occurring between an electrode and a work piece in the presence of dielectric liquid or gas. As dielectric fluid plays very significant role in any electrical discharge machining operation, selection of dielectric medium is an important consideration for EDM performance. It does not only serve to carry away the condensed metal particles from the spark …
Published in Trends in Mechanical Engineering & Technology · Vol. 6, Issue 1, 2016 · pp. 55–71 Read article
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Numerical Analysis of Thermal Performance of Cylindrical Perforated Pin Fins for Aligned Arrangement
Abstract: Present paper investigates the thermal characteristics pertaining to laminar forced convection heat transfer enhancement achieved in a flat surface mounted with cylindrical perforated pin fins in a rectangular channel having a area of cross section 280 x150 mm2.The analysis was done for the range of angle of perforated holes from 00 to 600 for a constant value of Reynolds Number and fixed fin spacing of 40 mm using air as …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 7, Issue 1, 2020 · pp. 8–16 Read article
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Precise Numerical Calculation of the Bond Number of a Fluid Drop and of the Surface Tension Coefficient at the Fluid-Gas Interface
Abstract: Precise calculation of the Bond number of a fluid drop and the surface tension coefficient at the fluid-gas interface plays an important role in modeling of the behavior of fluids in aircraft fuel tanks during overloads resulting from flight and the behavior of fluids in power supply and life support systems of spacecraft and space stations. The existing methods of calculation of the Bond number of a fluid drop and …
Published in Journal of Aerospace Engineering & Technology · Vol. 10, Issue 2, 2020 · pp. 15–22 Read article
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Boiling Heat Transfer Enhancement on Macro-, Micro- and Nano-scales
Abstract: This paper presents a review of investigations on boiling heat transfer enhancement on macro-, micro- and nano-scale surfaces and fluids by the authors at the Moscow Power Engineering Institute (MPEI) plus known results of other researchers. These investigations were conducted with the purpose of increasing safety and efficiency of power generating systems. The investigations were focused on such problems as effective cooling at high heat flux (1 MW/m2 and more), …
Published in Journal of Nuclear Engineering & Technology · Vol. 2, Issue 2-3, 2012 · pp. 1–10 Read article
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Development Aspects, Physiochemical Characteristics, Pharmaceutical Requirements and Different Manufacturing Procedures for Dry Powder Inhalation Formulations
Abstract: Dry Powder Inhalation (DPI) products are combination of pharmacologic activity and pharmaceutical properties including procedure used to manufacture. Desirable performance features of DPI are physical and chemical stability, ease of handling, accurate and reproducible delivery to the target organ and availability of drug at the site of action. The physical stability of DPI is of utmost importance as it results in ultimate deposition of drug through various dispersion mechanisms into …
Published in Research & Reviews: A Journal of Drug Formulation, Development and Production · Vol. 8, Issue 1, 2023 · pp. 40–48 Read article
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Enhancement of Horizontal Jet Impingement Heat Transfer Analysis on Vertical Flat Plate
Abstract: This research investigates the heat transfer characteristics and heat flux distribution associated with parallel jet impingement on a vertical flat plate. A comprehensive computational fluid dynamics (CFD) analysis is carried out and systematically validated against available experimental data to ensure the accuracy and reliability of the numerical model. The jet length is maintained constant at 12 mm, while the jet-to-plate separation distance is varied at 6, 12, 18, and 24 …
Published in Journal of Experimental & Applied Mechanics · Vol. 17, Issue 1, 2026 · pp. 65–80 Read article
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Twisted Tape Insert Effect on Heat Transfer Enhancement Placed in Smooth Tube: A Review
Abstract: Today heat exchangers are commonly used with twisted-tape inserts to improve convectiveheat transfer in various industries such as thermal power plants, chemical processing plants,air conditioning equipment, refrigerators, petrochemical, biomedical, and food processingplants. By using the twisted tape patch, the fluid flow swirls together, interrupting a thermalboundary layer on the surface of the pipeline. Heat exchanger thermal efficiency can beenhanced by heat transfer increase techniques. Tape insert is one of the …
Published in Journal of Thermal Engineering and Applications · Vol. 7, Issue 3, 2020 · pp. 25–28 Read article
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Implementations and Optimization in Design of Radiant Cooling Concept with Room Floor and Walls
Abstract: AbstractIn this paper, in order to accurately simulate room thermal performance, a coupling strategy between the room floor and wall with Computational Fluid Dynamics (CFD) simulation of the indoor airflow in a room, and the radiation heat transfer among the internal surfaces of its space and wall is calculated. Mostly research of radiant cooling is performed with radiant pipes in floors and ceiling, so we performed our analysis by installing …
Published in Journal of Thermal Engineering and Applications · Vol. 7, Issue 1, 2020 · pp. 15–23 Read article
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Investigation of Physical Characteristics and Machining Parameters of Improved Al-SiC MMC Using Dry EDM Process for Aerospace Industries
Abstract: Aluminium-based composite is widely used in aerospace and automobile industries because it is lighter in weight; but the trouble is that it is easily worn-out and life of the components is decreased. To overcome these problems, aluminium silicon carbide composite material has been developed with good wear-resistance, hardness and lighter weight. Silicon carbide has good mechanical properties like wear resistance, hardness, toughness and high melting point. Silicon carbide weight fractions …
Published in Journal of Experimental & Applied Mechanics · Vol. 9, Issue 1, 2018 · pp. 15–32 Read article
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Review of the Impact of Artificial Roughness in Solar Air Heaters
Abstract: Artificially roughening the heated surface of solar air heaters is a practical and affordable method to significantly increase the rate of heat transmission. Roughing up the surface can improve the design of a solar air heater (SAH) duct. The use of baffles, fins, ribs and grooves improves heat transmission in the SAH. Various efforts were made to improve heat transfer rates through duct employing these components, which resulted in significant …
Published in Trends in Machine design · Vol. 11, Issue 1, 2024 · pp. 1–9 Read article
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Experimental Analysis of Automotive Exhaust Heat Exchanger for Thermal Uniformity
Abstract: AbstractThe I.C. Engines are losing large amount of heat into environment directly. This waste heat can be reused for other purpose like TEG, Air conditioning etc. A heat exchanger is a device that is used to transfer thermal energy between two or more fluids, between a solid surface and a fluid, or between solid particulates and a fluid, at different temperatures and in thermal contact. In case of TEG there …
Published in Journal of Thermal Engineering and Applications · Vol. 5, Issue 1, 2018 · pp. 1–5 Read article
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Fluent Simulation & Analysis of Earth Heat Exchanger with Air as a Cooling Medium
Abstract: Because of the temperatures differential between the environment and the subsurface, an Earth Air Tube Heat Exchanger (EATHE) uses the thermal energy of the ground for air conditioners in the winter and air cooling in the summer. Everyone can lower the amount of energy needed for space heating or cooling with the aid of EATHE. However, it is challenging to create precise energy simulations and designs for calculating surface heat …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 11, Issue 1, 2024 · pp. 18–26 Read article
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Comparative Study of Dry, Wet and MQL Lubricating Method on Aluminium 7075 Using Vertical Milling Machine
Abstract: In present time the technology of CNC vertical milling machine has been improved significantly to meet the advance requirements in various manufacturing fields, in which the major contribution is of biomedical field, automobile field and aerospace industries, so while machining to get better surface finish generally lubrication method is used, which also helps to maintain the temperature near interface of tool and workpiece. If the traditional cooling method is used …
Published in Journal of Mechatronics and Automation · Vol. 8, Issue 1, 2021 · pp. 12–19 Read article
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A Method of Mesh Deformation for Flow Analysis Around Oscillating Bodies
Abstract: In general, high-speed rotating machines are subjected to complex phenomena due to various reasons, such as increased noise and strong vibration due to dynamic unbalance, which affect the dynamic motion of rotating machines and are necessarily a problem to overcome. Therefore, it is necessary to have a mathematical model to simulate it, and a strong tool to solve the constructed model. Using fluid-structure coupling techniques, which are currently a powerful …
Published in Journal of Experimental & Applied Mechanics · Vol. 16, Issue 2, 2025 · pp. 35–42 Read article