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58 articles for “instability”
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Simulation of Flow Vorticity and Instability Analysis in a Solid Rocket Motor
Abstract: Combustion instability is a major problem in most solid rocket motor (SRM) during its operation. More form of instability is generated due to several factors like coupling of combustion acoustic waves with flow dynamics, grain configuration, combustion chamber design, combustible mixture, etc. This type of flow turbulence is sustained in such system for long durations and leads to failure of the mission. In this paper, an effort has been made …
Published in Journal of Experimental & Applied Mechanics Read article
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Influence of Horizontal Crossflow on the Rayleigh-Taylor Instability: A Numerical Approach
Abstract: Rayleigh-Taylor Instability (RTI) is a typical occurrence in natural events, engineering, and industrial applications. When the lighter fluid (bottom medium) is forcing the heavier fluid (top medium) on top of the lighter fluid because of a gravitational field, then that phenomenon is called Rayleigh-Taylor instability (RTI). Despite extensive records of investigating this common phenomenon i.e., RTI with several unique boundary conditions, apparently, there are no prior investigations for the RTI …
Published in Research & Reviews : Journal of Physics · Vol. 14, Issue 1, 2025 · pp. 1–11 Read article
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Engineering Perspectives: Thermal and Structural Examination of Disc Brakes for Light Vehicles
Abstract: The procedure of braking transforms the kinetic energy of a car into mechanical energy that needs to be released as heat. High temperatures may result from the frictional heat produced at the disc and pad interface during the braking phase. Frictional heat produced on the rotor surface can contribute to an excessive rise in temperature, which can have unfavorable effects including premature wear, brake fluid vaporization (BFV), thermally excited vibrations …
Published in International Journal of Electrical Machine Analysis and Design · Vol. 1, Issue 2, 2023 · pp. 16–23 Read article
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Enhancing Chatter Resistance in Deep Hole Boring Through Modified Tool Design: A Study on Impact of Length-To-Diameter (L/D) Ratio
Abstract: Deep hole boring is a specialized machining process crucial for creating precise bores with high length-to-diameter (L/D) ratios, particularly vital in aerospace, automotive, and oil and gas industries. The L/D ratio is pivotal for stability and performance. Chatter, a detrimental vibration phenomenon, is a significant concern in deep hole boring, influenced by the L/D ratio. Higher L/D ratios increase chatter, leading to poor surface finish and reduced tool life. Longer …
Published in International Journal of Machine Systems and Manufacturing Technology · Vol. 2, Issue 2, 2024 · pp. 24–33 Read article
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A New Computational Method for Dust and Gas Dynamics in Protoplanetary Discs
Abstract: The simultaneous evolution of dust and gas in protoplanetary discs regulates essential events in planet formation, such as dust accumulation, migration, and the initiation of gravitational instabilities. Nevertheless, precisely modelling this interaction continues to provide a significant computing problem owing to the extensive variety of spatial and temporal scales involved. In this study, we introduce an innovative computational framework for simulating dust-gas dynamics in protoplanetary discs, integrating a two-fluid hydrodynamical …
Published in International Journal of Universe · Vol. 1, Issue 2, 2025 · pp. 35–46 Read article
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Foliar Application of Zinc Nanoparticles Improves Photosynthetic Performance in Wheat Plants
Abstract: The present study investigated the impact of foliar spray of zinc oxide nanoparticles on physiological and biochemical reactions in wheat (Triticum aestivum L.) Foliar spray with zinc oxide nanoparticles at 10 mg/l positively increased pigment content and biomass in comparison to control while a significant reduction in chlorophyll content and biomass accumulation was observed at higher concentration of 1000 mg/l. A study of Chlorophyll a fluorescence parameters at 10 mg/l …
Published in Research and Reviews : A Journal of Biotechnology Read article
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Treatment of Acute RVMI Complicated by High-Grade Bradycardia-Induced Shock Using Pacing-PTCA-ICT Combination
Abstract: Acute RVMI (right ventricular myocardial infarction), which would be possibly followed by bradycardia-induced shock, may perpetuate a vicious circle very quickly and result in short-term adverse outcomes as cardiac arrest and long-term outcomes as angina pectoris or recurrent myocardial infarction. In order to block this circle, emergent combination of temporary pacing and PTCA (percutaneous transluminal coronary angioplasty) may be necessary, and especially, in unexpected case that the occlused lesion is …
Published in Research and Reviews : A Journal of Medical Science and Technology · Vol. 13, Issue 1, 2024 · pp. 19–23 Read article
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Comparison of Index and Engineering properties of weak soils stabilized by Rubber Tyre Chips and Powder
Abstract: Engineered constructions on weak or soft ground soil carry inherent risks due to the instability of the foundation. Soft ground lacks the necessary strength to support structures adequately, making it prone to settlement, subsidence, or even collapse under the weight of buildings or infrastructure. Various methods of improvements are used to improve the soil's stability to support various loads.one of the solution is can use the waste products incorporated into …
Published in Journal of Polymer & Composites · Vol. 12, Issue 2, 2024 · pp. 24–33 Read article
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Advancements in Battery Monitoring for Electric Vehicle Optimization
Abstract: The shift towards electric vehicles (EVs) is inevitable as we move towards a more sustainable future, necessitating the development of more efficient EV technologies. Central to any EV is its battery management system (BMS), comprised of intricate electronic circuits like converters and inverters. The BMS is crucial for optimizing battery performance by monitoring and regulating key parameters such as current, voltage, state of charge (SOC), and temperature. Because of its …
Published in Journal of Thermal Engineering and Applications · Vol. 11, Issue 1, 2024 · pp. 8–13 Read article
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Developments in Power Electronics for the Integration of Renewable Energy
Abstract: As the integration of renewable energy sources into current power grids becomes an increasingly crucial task in the global transition towards a more sustainable energy future, the role of power electronics in this domain has become paramount. Effective conversion, control, and management of electrical energy from diverse sources hinge on the advancements in power electronics technologies, which are instrumental in addressing this complex challenge. This research paper provides an in-depth …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 14, Issue 1, 2024 · pp. 37–48 Read article
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Understanding of Environmental and Cultural Factors Affecting Online Purchase Behavior
Abstract: Online purchase behavior is influenced by a complex interplay of environmental and cultural factors, which are critical to understanding the context of e-commerce. This research aims to explore how these factors shape consumer behavior, providing insights for businesses to enhance their online strategies. Environmental factors include technological infrastructure, economic conditions, and regulatory policies that create the backdrop against which online transactions occur. For instance, a robust internet infrastructure and favorable …
Published in Journal of Communication Engineering & Systems · Vol. 14, Issue 3, 2024 · pp. 29–36 Read article
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Evaluating the Role of Energy Storage Systems in Vietnam’s Renewable Energy Integration
Abstract: Energy transition is taking place around the world due to the strong penetration of renewable energy sources in modern power systems. However, the most important disadvantage of these power sources is their instability. As a result, power systems are facing major challenges in transmission and distribution with unpredictable daily and seasonal fluctuations to meet the demands of human activities. Energy storage is being considered as one of the potential solutions …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 15, Issue 3, 2024 · pp. 44–54 Read article
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The Importance of Safety Engineering in the Design and Assessment of Foundations
Abstract: In safety engineering, ensuring the stability of structures under lateral loads is a critical aspect of foundation design. Lateral forces, such as wind, seismic activity, or other environmental pressures, exert overturning moments on columns, which must be carefully managed to prevent structural failure. To maintain stability, the overturning moment at the foundation base, generated by these lateral loads, must always be less than the restoring moment produced by the soil's …
Published in Journal of Industrial Safety Engineering · Vol. 11, Issue 3, 2024 · pp. 24–29 Read article
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A Quasi-Experimental Investigation of The Effects of Two Different Negative Pressure Levels During Open Endotracheal Tube Suctioning on Physiological Parameters in Mechanically Ventilated Patients in The PCCM ICU At Pt. B.D. Sharma P.G.I.M.S., Rohtak
Abstract: Introduction: Patients who are intubated often have difficulty clearing secretions through coughing. As a result, endotracheal suctioning is essential to minimize the risk of consolidation and atelectasis, which could impair ventilation. However, suctioning can pose several risks and complications, including bleeding, infection, atelectasis, hypoxemia, cardiovascular instability, increased intracranial pressure, and potential damage to the tracheal mucosa. The level of negative pressure applied during suctioning plays a crucial role in the …
Published in International Journal of Emergency and Trauma Nursing and Practices · Vol. 2, Issue 2, 2024 · pp. 29–58 Read article
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Under Voltage and Over Voltage Protection of Electrical Equipment - A Review
Abstract: In our modern, digitally-driven world, the seamless operation of electrical equipment is paramount, spanning industries, households, and infrastructure. However, the reliability of these vital assets is inextricably linked to the quality of electrical power supplied to them. Voltage fluctuations, specifically under voltage and over voltage events, pose significant threats to the integrity and functionality of electrical equipment. This review paper undertakes a comprehensive exploration of under voltage and over voltage …
Published in International Journal of Electrical Power and Machine Systems · Vol. 2, Issue 2, 2024 · pp. 1–9 Read article
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Atmospheric Boundary Layer Processes: Impacts on Weather Patterns and Climate Change
Abstract: The atmospheric boundary layer (ABL) is a vital component of the Earth's climate system, acting as the interface between the terrestrial surface and the overlying atmosphere. This layer, typically extending from the surface to a height of a few hundred meters, is characterized by strong gradients in meteorological variables such as temperature, humidity, wind speed, and atmospheric pressure. Understanding the dynamics of the ABL is essential for comprehending weather phenomena, …
Published in International Journal of Atmosphere · Vol. 1, Issue 2, 2024 · pp. 22–25 Read article
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Design And Implementation of Anti-Interference Low Power Double-Edge Trigger Flip-Flop Based On C-Element
Abstract: Double-Edge Triggered Flip-Flops (DETFFs) will use a lot more power when there are glitches and interference in the signal input. This work proposes an anti-interference low-power DETFF based on C-elements to efficiently lower the power consumption. This DETFF employs an enhanced C-element, which successfully filters input signal glitches, avoids redundant transitions within the DETFF, and lowers the transistor's charge and discharge frequencies. To lower its latency, the C-element has additionally …
Published in Journal of VLSI Design Tools and Technology · Vol. 15, Issue 1, 2025 · pp. 36–44 Read article
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Bal Ex Module with Prayer Regimes Improves Standing Dynamic Balance of balance disorders cases
Abstract: Integrating prayer regimes into balance rehabilitation, a well-established approach for patients with balance disorders offers an intriguing dimension to the therapy that had been incorporated in this Bal Ex Homebased video module for balance rehabilitation. Vestibular rehabilitation, often exemplified by Cawthorne-Cooksey exercises and their customized variants, effectively addresses symptoms like vertigo and instability. However, it's important to approach the inclusion of spiritual practices with sensitivity, acknowledging patients' diverse beliefs and …
Published in International Journal of Brain Sciences · Vol. 2, Issue 1, 2025 · pp. 10–14 Read article
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Development of a Sustainable Mini Powerhouse for a Micro Steam Power Plant
Abstract: This study outlines the steps taken to sustain and relocate a mini powerhouse for a 5 kW steam power plant, addressing previous structural and environmental inefficiencies. Due to corrosion, instability, and inadequate thermal management at the original site, a new location was selected and reinforced to meet these challenges. Key changes included site preparation involving granites and other structural support materials, enhanced thermal insulation, and improved ventilation systems. Performance evaluations …
Published in Trends in Machine design · Vol. 12, Issue 1, 2025 · pp. 20–29 Read article
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Polymer Chemistry and Composite Materials in Advanced Dental Flask Design
Abstract: This paper explores the role of polymer chemistry and composite materials in the development of a novel dental flask, emphasizing the advantages of polymer-based materials in dental prosthetic processing. Traditional dental flasks, often made from metals such as brass or stainless steel, are prone to issues like corrosion, dimensional instability, and wear over time. By incorporating advanced polymer composites, including chromium-coated materials, the novel dental flask offers enhanced durability, improved …
Published in Journal of Polymer & Composites · Vol. 13, Issue 4, 2025 · pp. 158–165 Read article