scholarly journals Design of a mechanical pedal valve to improve the use of water in plumbing systems

2021 ◽  
Vol 2118 (1) ◽  
pp. 012008
Author(s):  
L F López Uribe ◽  
C S Sánchez Rincón ◽  
M Díaz Jiménez ◽  
E Flórez Solano
Keyword(s):  
Environmental Factor ◽  
Technical Standard ◽  
High Demand ◽  
Analytical Methodology ◽  
Ansys Fluent ◽  
Industrial Sectors ◽  
Computer Aided ◽  
Plumbing Systems ◽  
Operator Control ◽  
Design Factors

Abstract The use of water is a very important economic and environmental factor in all industrial sectors since the improvement in its use offers an optimization of this resource. The waste of water usually causes damages firstly to the environment by the supply sources, then to the industries by its high demand and to the hydrosanitary sources that the houses have. The valves have some control that allows a more comfortable use of this resource in sinks that provides some savings. Currently, there are valves that usually replace the traditional ones due to their automatic and/or mechanical operation, which allows for innovation and savings of this resource. In this sense, this research is oriented to the design of a mechanical pedal valve that allows a more comfortable and controlled control, thus granting the operator control in an immediate way, without wasting the fluid in the middle of the washing and avoiding a manual contact that in a certain way dissipates the risk of contagion of diseases such as Covid-19 by direct manipulation. An analytical methodology supported by computer aided drafting programs such as Ansys Fluent and SolidWorks was used. Finally, it was determined that, for the dynamic and static studies, the designed valve complies with the Colombian technical standard and the static design factors.

Aerodynamic Performance Evaluation of Axial Flow Fan Using Numerical Techniques

2021 ◽  
Author(s):  
Raghuvaran D. ◽  
Satvik Shenoy ◽  
Srinivas G
Keyword(s):  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Rotational Speed ◽  
Total Pressure ◽  
Axial Flow ◽  
High Mass ◽  
Ansys Fluent ◽  
Industrial Sectors ◽  
Mass Flow Rates

Abstract Axial flow fans (AFF) are extensively used in various industrial sectors, usually with flows of low resistance and high mass flow rates. The blades, the hub and the shroud are the three major parts of an AFF. Various kinds of optimisation can be implemented to improve the performance of an AFF. The most common type is found to be geometric optimisation including variation in number of blades, modification in hub and shroud radius, change in angle of attack and blade twist, etc. After validation of simulation model and carrying out a grid independence test, parametric analysis was done on an 11-bladed AFF with a shroud of uniform radius using ANSYS Fluent. The rotational speed of the fan and the velocity at fan inlet were the primary variables of the study. The variation in outlet mass flow rate and total pressure was studied for both compressible and incompressible ambient flows. Relation of mass flow rate and total pressure with inlet velocity is observed to be linear and exponential respectively. On the other hand, mass flow rate and total pressure have nearly linear relationship with rotational speed. A comparison of several different axial flow tracks with the baseline case fills one of the research gaps.

Estimating on-Board Power Generation by Solar Photo-Voltaic Array Integrated Lighter-Than-Air Platform Under Variable Pitching Conditions

2020 ◽  
Vol 142 (4) ◽  
Author(s):  
Kuntal Ghosh ◽  
Shriya Vijay Pawar ◽  
Ayan Kumar Banerjee ◽  
Anirban Guha ◽  
Siddhartha P. Duttagupta
Keyword(s):  
Power Generation ◽  
Ambient Air ◽  
The Body ◽  
Solar Pv ◽  
Solar Insolation ◽  
Analytical Methodology ◽  
Ansys Fluent ◽  
Daunting Task ◽  
Fluent Software ◽  
Sustainable Power

Abstract Sustainable power generation on solar photovoltaic (SPV) modules integrated lighter-than-air platforms (LTAPs) is a daunting task since they are exposed to variable environmental factors such as wind, ambient air pressure, and incident solar insolation. Among these factors, the wind plays a significant role in destabilizing the system from its equilibrium position and affects the power generation. In this paper, we proposed a methodology for estimating the dynamics of power generation due to the destabilized pitching under different wind vectors. An alternative to the conventional fluid–structure interaction, a semi-analytical methodology has been formulated, utilizing commercial ansys fluent software, to estimate the pitching characteristics of lighter-than-air platform (LTAP). This pitching characteristic has been mapped to the body inertial frame for investigating the incident solar insolation followed by determining the corresponding power generation. The consequences of the envelope contour function (ECF) are also incorporated while characterizing the power generation. Furthermore, this study also provides scope for the placement of the solar PV array on LTAP in order to minimize losses in generated onboard power under variable pitching conditions.

Small Scale testing of Nickel-based Superalloys produced by ALM

2021 ◽  
Author(s):  
◽  
Hani Hilal
Keyword(s):  
Gas Turbine ◽  
Process Parameters ◽  
Structural Integrity ◽  
Defect Formation ◽  
Aerospace Industry ◽  
Small Scale ◽  
High Temperature Strength ◽  
Analytical Methodology ◽  
Industrial Sectors ◽  
Wide Range

Nickel-based superalloys exhibit an impressive range of mechanical properties, from high temperature strength and toughness to excellent oxidation and corrosion resistance. It is for these reasons that they are heavily incorporated in a wide range of industrial sectors, particularly the aerospace industry where they are extensively utilised within the combustor and turbine section of a holistic gas turbine engine, where temperatures often reach arduous conditions. Although nickel-based superalloys are typically manufactured using traditional cast and wrought methodologies, the aerospace industry is becoming increasingly interested in the use of alternative manufacturing methods in an attempt to further drive gas turbine development through weight reduction and increased Turbine Entry Temperatures (TET). As such, interest regarding the use of near-net shape manufacturing technologies such as Additive Layer Manufacturing (ALM) has risen in parallel, but concerns have arisen given the metallurgical complexity of the process and the prevalence of phenomena such as anisotropic behaviour, residual stressing and structural integrity. This thesis has investigated the influence of key process parameters and variables on the mechanical and microstructural behaviour of the two-contrasting nickel-based superalloys, CM247LC and IN718. A novel miniaturised mechanical testing method, Small Punch (SP), in combination with in-depth material characterisation techniques was implemented on a series of Laser Powder Bed Fusion (LPBF) variants of differing build orientation and parameter selections. In addition to this, a robust analytical methodology was employed on a series of LPBF variants in order to ascertain process parameters’ influence on melt pool profile and both alloys relative propensity for defect formation. The findings of this work will help further the understanding of parameter selection and support a key development strategy being implemented by Rolls-Royce plc. regarding the safe incorporation of additive components into service.

scholarly journals Exploring the Inclusion of Design Factors in Computer Aided Inventing

2008 ◽  
pp. 453-459
Author(s):  
Rosario Vidal ◽  
Elena Mulet ◽  
Belinda López-Mesa ◽  
M. José Bellés ◽  
Graham Thompson
Keyword(s):  
Computer Aided ◽  
Design Factors

scholarly journals SIMULATION ANALYSIS ON SO₂ REDUCTION INSIDE A SEAWATER SCRUBBER

2019 ◽  
Vol 81 (6) ◽  
Author(s):  
Nur Tantiyani Ali Othman ◽  
Norzatul Ashirah Mohd Alias
Keyword(s):  
Gas Flow ◽  
Simulation Analysis ◽  
Spray Nozzle ◽  
Liquid Droplets ◽  
Gas Velocity ◽  
Ansys Fluent ◽  
So2 Emission ◽  
Industrial Sectors ◽  
Marine Industry ◽  
Velocity Pressure

The marine industry is one of the industrial sectors that release sulphur dioxide (SO2) into the atmosphere as a result of heavy fuel oil’s combustion as an energy source. Generally, flue gas desulphurization method has been used to control the SO2 emission where seawater used as the alkaline slurry. However, usually the gas velocity at the scrubber’s wall is moderately high that could contribute to the uneven distribution of liquid droplets over the entire domain surface, and consequently can affect the amount of SO2 reduction released. Hence, the purpose of this study is to observe the gas flow pattern in the scrubber and to determine the effect of a spray nozzle angle on the SO2 reduction released. The scrubber with 4.46 m in the height, 1.35 m in the diameter and spray nozzle angle between 80-120ᵒ was designed using Ansys Fluent© version 17.2. Three factors which are gas velocity, pressure, and temperature of gas were studied to achieve the optimum SO2 reduction. The simulation result shows the declination trend in these three factors on the gas distribution as the angle of the spray nozzle is increased. The percentage of SO2 reduction is increased up to 17 % for the spray nozzle angle between 80-120ᵒ.

scholarly journals Numerical Assessment of Shear Boundary Layer Formation in Sewer Systems with Fluid-Sediment Phases

Water ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1332
Author(s):  
Yang Ho Song ◽  
Jin Gul Joo ◽  
Jung Ho Lee ◽  
Do Guen Yoo
Keyword(s):  
Boundary Layer ◽  
Volume Fraction ◽  
Empirical Studies ◽  
Stormwater Runoff ◽  
Soil Slurry ◽  
Sewer System ◽  
Analytical Methodology ◽  
Ansys Fluent ◽  
Inlet Conditions ◽  
Slurry Transport

Numerical and empirical studies of soil slurry transport and deposition in urban stormwater sewers are few, presumably due to the difficulty of direct observation of soil slurry flow in stormwater pipes. Slurry in a sewer system includes both suspended load and bedload, but few studies have attempted to demarcate these two components. A boundary layer is a crucial determinant of sediment transport capacity. Stormwater runoff enters the sewer in turbulent flow, mostly mixed with soil slurry generated by rainfall. In this paper, we attempt analysis using ANSYS Fluent commercial CFD software. We describe the development of a numerical analytical methodology capable of predicting the flow of soil slurry in stormwater pipes, and propose a method for estimating the sediment–flow boundary layer. Using this model, we simulated stormwater runoff with a large content of soil slurry during a rainfall event. We investigated soil slurry transport and predict the formation of shear boundary layer by varying the inlet conditions (volume of soil slurry entering the stormwater sewer system) and by analyzing the flow velocity field and soil slurry volume fraction in the pipes under various experimental flow conditions. Based on the shear and settling velocity of sediment particles, we propose criteria for the formation of a shear boundary layer in stormwater pipes.

Thermohydraulic optimization of triple concentric-tube heat exchanger: A multi-objective approach

2018 ◽  
Vol 233 (3) ◽  
pp. 589-600 ◽  
Author(s):  
Tarikayehu Amanuel ◽  
Manish Mishra
Keyword(s):  
Heat Transfer ◽  
Nusselt Number ◽  
Heat Exchanger ◽  
Friction Factor ◽  
Effective Parameters ◽  
Ansys Fluent ◽  
Tube Heat Exchanger ◽  
Large Growth ◽  
Design Factors ◽  
Response Variables

In the present study, optimization of heat transfer and pressure drop characteristics in a triple concentric tube heat exchanger has been done using the results of numerical simulation. A commercial CFD software ANSYS Fluent v17.0 has been employed for simulating the flow and heat transfer, while optimization has been done by Response surface methodology (RSM) and Genetic algorithm (GA). The effective parameters in the study are Reynolds number (2500 ≤ Re ≤ 10,000) and Length to hydraulic diameter ratio (100 ≤ L/Dh ≤ 220). The optimum values, as well as the functional relationship between the design factors (Re and L/Dh) and response variables (Nu and f), have also been developed. It has been found that both the design factors (Re and L/Dh) have a strong influence on the response variables (Nu and f). With the increase in Re (flow rate), a large growth in Nusselt number and decline in friction factor has been observed. However, with the increase in L/Dh, an enormous decrease in both Nusselt number and friction factor has been found.

scholarly journals Learning Processes in Mechanics of Structures: Allying Analytical and Numerical Approaches

2020 ◽  
Vol 10 (4) ◽  
pp. 114
Author(s):  
Fábio A. O. Fernandes ◽  
Clauber Marques ◽  
Jovani Castelan ◽  
Daniel Fritzen ◽  
Ricardo J. Alves de Sousa
Keyword(s):  
Computer Aided Design ◽  
Engineering Students ◽  
Model Development ◽  
Three Dimensional ◽  
Scientific Basis ◽  
Mechanical Resistance ◽  
Analytical Methodology ◽  
Mechanics Of Materials ◽  
Computer Aided ◽  
Aided Design

This paper reports pedagogical experiences and educational techniques in the field of Mechanics of Structures (Mechanical Engineering degree), resorting to computational tools. Several aspects are addressed, covering CAD (Computer-Aided Design) modelling systems to CAE (Computer-Aided Engineering) solutions, in terms of analysis and validation of mechanical resistance calculations. Therefore, structural mechanics fundamental concepts and mechanics of materials are also addressed. Particular focus is given on the development of curricula components related to Computer-Aided Design and Manufacturing. Doing so, three-dimensional structural modelling is applied to study the behaviour in selected simple case-studies where an external load is applied and the corresponding deflections are evaluated. Then, analytical and numerical analyses are performed and compared. During classes, patent aversion to solve analytical problems was clearly observed on the part of the students once calculus knowledge was required. The typical trend in engineering students, skipping the manual analytical methodology to solve a problem in order to go straight to numerical simulations via commercial Finite Element (FE) codes, was observed. The main focus of this work is, therefore, to determine the pedagogical effects of allying the analytical procedures and virtual simulators. It was possible to confirm the beneficial aspects of such methodology, considering that the regular engineering student has already a scientific basis on calculus and analytical process. Such knowledge will support mechanical project decisions, from model development to the analysis, and a sounding background to perform criticism of the results provided by the software.

Computer-aided methods for 3-D visualization of serial sections and thick biological specimens

1992 ◽  
Vol 50 (2) ◽  
pp. 1060-1061
Author(s):  
Mark Ellisman ◽  
Maryann Martone ◽  
Gabriel Soto ◽  
Eleizer Masliah ◽  
David Hessler ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Three Dimensional ◽  
Neuritic Plaque ◽  
Dimensional Structure ◽  
Data Sets ◽  
Molecular Physiology ◽  
Research Activities ◽  
Computer Aided ◽  
Dimensional Reconstruction

Structurally-oriented biologists examine cells, tissues, organelles and macromolecules in order to gain insight into cellular and molecular physiology by relating structure to function. The understanding of these structures can be greatly enhanced by the use of techniques for the visualization and quantitative analysis of three-dimensional structure. Three projects from current research activities will be presented in order to illustrate both the present capabilities of computer aided techniques as well as their limitations and future possibilities.The first project concerns the three-dimensional reconstruction of the neuritic plaques found in the brains of patients with Alzheimer's disease. We have developed a software package “Synu” for investigation of 3D data sets which has been used in conjunction with laser confocal light microscopy to study the structure of the neuritic plaque. Tissue sections of autopsy samples from patients with Alzheimer's disease were double-labeled for tau, a cytoskeletal marker for abnormal neurites, and synaptophysin, a marker of presynaptic terminals.

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