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Journal articles on the topic 'Alternate gas flows'

Author: Grafiati

Published: 22 June 2024

Last updated: 31 July 2025

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1

Tyagi, Asha, Vineeta Venkateswaran, Ajai Kumar Jain, and Uttam Chandra Verma. "Cost Analysis of Three Techniques of Administering Sevoflurane." Anesthesiology Research and Practice 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/459432.

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Background. This study aimed to evaluate and compare total cost of sevoflurane and propofol for 1.0 MAC-hour of anaesthesia, employing three anaesthetic techniques.Methods. Adult patients scheduled for surgical procedures under general anaesthesia anticipated to last approximately an hour were randomized into three groups (n=15each), to receive anaesthesia using one of the following techniques: low flow technique involving induction with propofol, followed by sevoflurane delivered using initial fresh gas flows of 6 L/min till MAC reached 1.0 and then reduced to 0.5 L/min; alternate method of l

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2

Dhanasekaran, C., and G. Mohankumar. "Hydrogen Gas in Diesel Engine Using DEE as Ignition Source." Applied Mechanics and Materials 591 (July 2014): 150–54. http://dx.doi.org/10.4028/www.scientific.net/amm.591.150.

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Over the past two decades considerable effort has been taken to develop and introduce new alternate source of energy for the conventional gasoline and diesel. Environmental pollution and uncertainty in cost of petroleum products are the principal driving forces for this movement. The major pollutants from an Diesel engine system are NOx, Smoke, particulate matter, Soot. Several alternative fuels were tried but all of them are carbon based fuels, therefore net carbon based pollutants cannot be reduced. One alternative to carbon-based fuels is hydrogen. Hydrogen a non-carbon fuel only can meet z

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LOMBARDINI, M., D. J. HILL, D. I. PULLIN, and D. I. MEIRON. "Atwood ratio dependence of Richtmyer–Meshkov flows under reshock conditions using large-eddy simulations." Journal of Fluid Mechanics 670 (February 1, 2011): 439–80. http://dx.doi.org/10.1017/s0022112010005367.

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We study the shock-driven turbulent mixing that occurs when a perturbed planar density interface is impacted by a planar shock wave of moderate strength and subsequently reshocked. The present work is a systematic study of the influence of the relative molecular weights of the gases in the form of the initial Atwood ratio A. We investigate the cases A = ± 0.21, ±0.67 and ±0.87 that correspond to the realistic gas combinations air–CO2, air–SF6 and H2–air. A canonical, three-dimensional numerical experiment, using the large-eddy simulation technique with an explicit subgrid model, reproduces the

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4

Adkins, Bruce D., Zach Mills, James Parks II, et al. "Predicting thermal excursions during in situ oxidative regeneration of packed bed catalytic fast pyrolysis catalyst." Reaction Chemistry & Engineering 6, no. 5 (2021): 888–904. http://dx.doi.org/10.1039/d1re00007a.

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Modelling quantifies thermal excursions when a conventional packed bed of coked catalyst is oxidatively decarbonized. The model can indicate when alternate designs, such as radial beds with high gas recycle or moving beds, should be considered.

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Daya, Rohil, Christopher J. Keturakis, Dylan Trandal, Ashok Kumar, Saurabh Y. Joshi, and Aleksey Yezerets. "Alternate pathway for standard SCR on Cu-zeolites with gas-phase ammonia." Reaction Chemistry & Engineering 6, no. 6 (2021): 1042–52. http://dx.doi.org/10.1039/d1re00041a.

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6

Lim, Min Yee, Xinyue Zhang, Jian Huang, et al. "Study of Thermal Behavior of Moxa Floss Using Thermogravimetric and Pyrolysis-GC/MS Analyses." Evidence-Based Complementary and Alternative Medicine 2021 (February 16, 2021): 1–7. http://dx.doi.org/10.1155/2021/6298565.

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Moxa floss is a type of biomass used as the main combustion material in moxibustion, a therapy that applies heat from moxa floss combustion to points or body areas for treatment. Safety concerns regarding moxa smoke have been raised in recent years. Since moxa floss is the source material in moxibustion, its thermal behavior and pyrolysis products would be related to the products formed in moxa smoke. This work aims to understand the thermal behavior of moxa floss and investigate the pyrolysis products generated from moxa floss combustion. Six commercial moxa floss samples of 3 storage years a

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Aquino, Andrea, Davide Picchi, and Pietro Poesio. "Modeling the motion of a Taylor bubble in a microchannel through a shear-thinning fluid." E3S Web of Conferences 312 (2021): 05006. http://dx.doi.org/10.1051/e3sconf/202131205006.

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Applications of multiphase flows in microchannels as chemical and biological reactors and cooling systems for microelectronic devices typically present liquid slugs alternated with bubbles of elongated shape, the Taylor bubbles. These occupy almost entirely the cross-section of the channel and present a hemispherical front and a liquid layer, the lubrication film, which separates the gas from the tube wall. The Taylor bubble perturbs the surrounding fluids activating many transport mechanisms in the proximity of the gas-liquid interface; therefore, the bubble motion significantly influences th

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Dinesh Kumar Venkatesan, Vinayak Bhimsen Hemadri, Chinnapandian Marimuthu, and Khathanahalli Mathada Mrityunjayaswamy. "Esterified Papaya Oil and Flamboyant Oil as a Fuel on Single Cylinder Diesel Engine." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 99, no. 1 (2022): 90–103. http://dx.doi.org/10.37934/arfmts.99.1.90103.

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The future demand, increase in the price and environmental issues of fossil fuels necessitated the search of renewable alternate called biodiesel which reduces the dependence of fossil fuel import from other countries. The present research investigation outlines a detailed vision on the performance parameters and the exhaust characteristics of the methyl esters of papaya oil (POME) and flamboyant oil (FOME) and its blends on water cooled diesel engine comprising single cylinder running at 1500 rpm. The collected seeds are processed and found to contain oil percentage of 37% and 35% and they ar

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9

Trapeznikova, M. A., A. A. Chechina, and N. G. Churbanova. "Simulation of Vehicular Traffic using Macro- and Microscopic Models." Computational Mathematics and Information Technologies 7, no. 2 (2023): 60–72. http://dx.doi.org/10.23947/2587-8999-2023-7-2-60-72.

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To effectively regulate traffic on highways and networks of modern megacities, it is necessary to introduce Intelligent Transport Systems, which include many innovative solutions, in particular, mathematical models for describing the dynamics of traffic flows.The article is devoted to a brief description of the current state in this area in its development — from the simplest macroscopic and microscopic models that have become classic to modern developments.Special attention is paid to the original multilane models developed by the authors of the article within both approaches.The macroscopic

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10

Prashantha, B. G., D. R. Swamy, Bhimasen Soragaon, and T. S. Nanjundeswaraswamy. "Design Optimization and Analysis of Thermoacoustic Refrigerators." International Journal of Air-Conditioning and Refrigeration 28, no. 03 (2020): 2050020. http://dx.doi.org/10.1142/s2010132520500200.

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Thermoacoustic refrigeration, a novel technology, uses eco-friendly gases like helium, air or the mixture of noble gases as working substances in the absence of moving parts. The design, optimization and analysis of thermoacoustic refrigerators using helium and air as oscillating gases are discussed. Pure helium is chosen since it is proven as the best and economical working gas compared to the alternate pure or the mixture of noble gases. Air is chosen since it is abundant in nature and the least cost of the pressurized dry air cylinders. The design optimization strategies discussed in this p

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11

Tolaev, Bobur Bakhodir ogli, Kamola Boratovna Rakhmatullaeva, Orifjon Alimakhamatovich Ibragimov, and Aziz Nizamovich Inamov. "Prospects of Mapping Alternative Energy Resources Based on Foreign Experiences." International Journal of Multidisciplinary Research and Analysis 05, no. 11 (2022): 3244–47. https://doi.org/10.5281/zenodo.7375368.

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This article is based on foreign experiences of mapping alternative energy sources, developing a regional and local level database and maps on the use of alternative energy resources, collecting statistical data on wind, solar, small water flows, geothermal resources, natural and Schematization of socio-economic indicators is dedicated to the analysis of the results of scientists who are conducting certain scientific research works on the use of alternative energy resources in our country today.

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Varikunta, Saikrishna, and Ashwani Kumar Sharma. "GAMS applications to capacitors location and its sizing in a RDS." International Journal of Engineering, Science and Technology 14, no. 3 (2022): 21–28. http://dx.doi.org/10.4314/ijest.v14i3.3s.

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This paper presents a new approach for finding capacitor's location and it's sizing in a radial distribution system (RDS) optimally with an aim of reducing the active power loss. In this paper, the problem of minimizing power loss is converted into a Mixed Integer Non-Linear Program (MINLP) problem, and it will be solved by using Generalized Algebraic Modeling Systems (GAMS) software with MINLP-SBB Solver. The proposing GAMS approach is tested on IEEE 10 bus RDS. By using GAMS, the programming will be simple and more accurate results can be achieved with less execution time. The MATLAB R2020b

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13

Ludmila, Knaub. "Improvement of mixing processes in diesel engines." Technology audit and production reserves 3, no. 1(59) (2021): 16–18. https://doi.org/10.15587/2706-5448.2021.232050.

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<em>The object of research is gas-dynamic vortex processes in heterogeneous polydisperse flows. One of the most problematic issues in engine building is the completeness of combustion and the rate of fuel burnout in the given coordinates on the allotted hourly interval in the combustion chamber. These indicators, in turn, determine stringent requirements for used fuels in terms of thermophysical parameters that affect sawing, evaporation and mixing with an oxidizer. In the course of the study, methods of mathematical modeling were used based on the theory of similarity. Methods have been devel

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14

Saeed, Muhammad, Muhammad Zafar, Abdul Razzaq, Shenawar Ali Khan, Zakir Khan, and Woo Young Kim. "Visible-Light-Active Zn–Fe Layered Double Hydroxide (LDH) for the Photocatalytic Conversion of Rice Husk Extract to Value-Added Products." Applied Sciences 12, no. 5 (2022): 2313. http://dx.doi.org/10.3390/app12052313.

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One of the major causes of excess CO2 in the atmosphere is the direct burning of biomass waste, which can be obviated by the photocatalytic biomass conversion to useful/valuable chemicals/fuels, a sustainable and renewable approach. The present research work is focused on the development of a novel Zn–Fe LDH by a simple co-precipitation method and its utilization for the photocatalytic conversion of a rice husk extract (extracted from rice husk by means of pyrolysis) to value-added products. The synthesized, pure Zn–Fe LDH was characterized by various analytical techniques such as XRD, SEM, FT

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15

Dhawan, Sandeep. "Technology Focus: Well Integrity (January 2024)." Journal of Petroleum Technology 76, no. 01 (2024): 74–75. http://dx.doi.org/10.2118/0124-0074-jpt.

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The context of last year’s Well Integrity Technology Focus was the repurposing of existing oil and gas wells for carbon storage, flow-wet material conformity, and associated integrity risks. Typically, oil and gas producing wells are abandoned toward the end of their life cycles with reservoir pressures depleted compared with the virgin pressures. Carbon capture and storage (CCS) projects, however, present different operating conditions. First, the pressurized containment sites have a higher life expectancy, say, between 50 and 100 years. Second, the containment pressure is possibly higher tha

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16

Prabhu, Sharad V., and Shripad P. Mahulikar. "An Alternate Approach to Friction Factor Computations Based on Entropy Generation in Gas Micro Flows." SSRN Electronic Journal, 2017. http://dx.doi.org/10.2139/ssrn.3101266.

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17

Rocheleau, R. E., S. C. Jackson., S. S. Hegedus, and B. N. Baron. "Properties of a-Si:H and a-SiGe:H Films Deposited by Photo-Assisted CVD." MRS Proceedings 70 (1986). http://dx.doi.org/10.1557/proc-70-37.

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ABSTRACTChemical vapor deposition techniques, in particular plasma enhanced CVD, have been used to produce high quality a-Si:H materials. Continuing research is directed toward increased device performance, improved stability, and translation of scale to commercial production. A part of this effort is the evaluation of alternate CVD techniques which in addition to providing technical options for high efficiency and long term stability are likely to lead to improved understanding of the relationships between deposition processes and material properties. A relatively new technique for depositing

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18

Garg, Gagan, Tapan K. Mankodi, Esmaeil Esmaeilifar, and Rho Shin Myong. "Neural network-based finite volume method and direct simulation Monte Carlo solutions of non-equilibrium shock flow guided by nonlinear coupled constitutive relations." Physics of Fluids 36, no. 10 (2024). http://dx.doi.org/10.1063/5.0223654.

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For understanding many real-world problems involving rarefied hypersonic, micro-, and nanoscale gas flows, the primary method may be the direct simulation Monte Carlo (DSMC). However, its computational cost is prohibitive in comparison with the Navier–Stokes–Fourier (NSF) solvers, eclipsing the advantages it provides, especially for situations where flow is in the near continuum regime or three-dimensional applications. This study presents an alternate computational method that bypasses this issue by taking advantage of data-driven modeling and nonlinear coupled constitutive relations. Instead

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19

Wang, Xin, Pinakin Soni, Amrish Patel, et al. "#598 Successful application of allo-hemodialysis in a porcine model of embolization-induced acute kidney injury." Nephrology Dialysis Transplantation 39, Supplement_1 (2024). http://dx.doi.org/10.1093/ndt/gfae069.752.

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Abstract Background and Aims Annually, millions of kidney patients, primarily in low- and low-middle income nations, die prematurely due to the lack of affordable kidney replacement therapy. We propose a novel, low-cost alternative dialysis modality called allo-hemodialysis (alloHD), where blood of a patient with kidney failure flows counter-current to the blood of a healthy subject (“buddy”) through the dialyzer [1]. Uremic solutes and excess fluid are then excreted by the buddy's healthy kidneys. We have already demonstrated the technical feasibility of alloHD in pigs with acute kidney injur

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20

"Prepaid Electricity Billing System using Arduino." International Journal of Recent Technology and Engineering 8, no. 5 (2020): 1757–59. http://dx.doi.org/10.35940/ijrte.e6322.018520.

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The World is changing very fast. With the advancement in technology, the needs and demands for various resources is increasing too. Earlier, when the technology was not that advanced. We, Humans, never thought about saving resources and never thought about efficiency, as everything was abundant. However, with this fast growing world and increasing demands, Scientists have started worrying about the Sustainable Development. The pace at which all these resources are being used, soon they will be fully depleted. Already the need for saving the resources like Petroleum and Natural gas has been und

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21

Prashantha, B. G., G. S. V. L. Narasimham, S. Seetharamu, and K. Manjunatha. "Effect of Gas Blockage on the Theoretical Performance of Thermoacoustic Refrigerators." International Journal of Air-Conditioning and Refrigeration 29, no. 03 (2021). http://dx.doi.org/10.1142/s2010132521500267.

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Thermoacoustic refrigeration is an emerging green, novel and promising alternate technology compared to vapor compression refrigerator systems for domestic cooling. It uses environmentally benign gases like air or helium or the mixture of inert gases as working substances and has no moving parts, no lubrication and no vibration. The cooler is designed and optimized with helium and air as refrigerants operating at 10[Formula: see text]bar with 3% drive ratio for the temperature difference of 28[Formula: see text]K and stack diameter of 200[Formula: see text]mm using linear thermoacoustic theory

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22

"Point source pollution and climate change impact from sequential batch reactor wastewater treatment plant." Issue 1 20, no. 1 (2017): 33–41. http://dx.doi.org/10.30955/gnj.002231.

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Since sequential batch reactor (SBR) system is sequentially removes carbon, nitrogen and phosphorous in a single reactor by maintaining anoxic and aerobic stages, it recently has attracted a great deal of interest. This study evaluates the impact of wastewater treatment plant (WWTP) with a SBR system on a creek which is the influent tributary to Aegean Sea. Accordingly, this study demonstrates (1) the treatment efficiency of full-scale WWTP; (2) how WWTP influences creek’s water quality from 2012 to 2015; (3) how creek influences receiving body’s water quality; and (4) the potential climate ch

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23

PATEL, Bhaveshkumar, and Ashok PAREKH. "Energy, exergy and entropy analysis with R1234yf as an alternate refrigerant to R134a of automobile air conditioning system." Journal of Thermal Engineering, March 2, 2023, 101–14. http://dx.doi.org/10.18186/thermal.1429400.

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A major portion of the worldwide emissions arise from mobile air-conditioning systems with hydrofluorocarbon refrigerant as working substance and which is one of major cause for the greenhouse effect. R134a refrigerant having GWP of 1400 has been extensively used in car air conditioning. To reduce greenhouse gas emissions, the current R134a refrigerant must be phase out as per Kigali Amendment. The present study deals with cooling load calculation of car model by heat balance method as per ASHRAE standard using local climate condition. Further, thermodynamic analysis of R1234yf as an alternate

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24

Han, Jiaxiang, Qiaodong Bai, Shijian Zhang, and Chunsheng Weng. "Experimental study on propagation mode of rotating detonation wave with cracked kerosene gas and ambient temperature air." Physics of Fluids, July 3, 2022. http://dx.doi.org/10.1063/5.0101801.

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In order to obtain the propagation characteristics of rotating detonation wave (RDW) of cracked kerosene gas (CKG) and ambient temperature air, a series of experiments were carried out at different cracking kerosene and air mass flow rates. The propagation mode of RDW was analyzed in detail, and the ignition range of CKG and air was evaluated. In the experiment, the propagation modes of rotating detonation mainly include single rotating detonation wave (SRDW) mode, reversed single rotating detonation wave (RSRDW) mode and mixed mode. In mixed mode, SRDW and two-counter rotating detonation wave

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25

Binet, Flavien, François Saunier, and Manuele Margni. "Assessing the Mitigation Potential of Environmental Impacts From Circular Economy Strategies on an Industrial Sector and Its Value Chain: A Case Study on the Steel Value Chain in Quebec." Frontiers in Sustainability 2 (November 11, 2021). http://dx.doi.org/10.3389/frsus.2021.738890.

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This research project aims to evaluate the potential reduction of environmental impacts from circular economy strategies on an industrial sector at a regional scale with a case study on Greenhouse Gas (GHG) emissions in Quebec's steel industry and its value chain. To do so, an integrated model has been created based on the matrix approach, building on material flow analysis (MFA) tracking flows and stocks and on life cycle assessment (LCA) to compute direct (from the activity, e.g., combustion process) and indirect (from the supply chain, e.g., production of raw material inside or outside of r

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26

Ullah, Izhar, Tim Burdett, Lesley M. Wright, Je-Chin Han, and Ching-Pang Lee. "Evaluation of Wavy-Trailing-Edge Film Cooling Versus Pressure Side Cutback Cooling." Journal of Thermophysics and Heat Transfer, January 24, 2024, 1–9. http://dx.doi.org/10.2514/1.t6745.

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This study measures the film cooling effectiveness along the trailing edge (TE) of a turbine blade in a linear cascade. The film cooling effectiveness is measured and analyzed using the pressure-sensitive paint (PSP) technique. Two different TE designs are investigated: the standard pressure side cutback and the new alternating discharge design (referred to as a wavy-TE design). The alternating discharge design is a new design with a wavy structure between the pressure and suction surfaces at the TE. The new wavy structure allows the coolant to discharge from the TE so that it alternates betwe

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27

"The biophysical modelling of the diffusion in the living systems." Medical & Clinical Research 8, no. 7 (2023). http://dx.doi.org/10.33140/mcr.08.07.01.

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The transport phenomena mean the variation in time and space of generalized forces when they generate flows for which conservation laws apply. According to the general definition, the diffusion is a mass transportation under the action of a generalising force, which can be the concentration gradient, the pressure gradient, etc. The diffusion is explained on the basis of the spontaneous movement of the molecules which have the tendency to spread in equal numbers in each subspace tendency which arises from the concentration gradient. The diffusion is a frequently found phenomenon: with diffusion

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