Computer-aided design and optimization of centrifugal pumps

2005 ◽  
Vol 219 (3) ◽  
pp. 187-193 ◽  
Author(s):  
M Asuaje ◽  
F Bakir ◽  
S Kouidri ◽  
R Noguera ◽  
R Rey
Keyword(s):  
Performance Analysis ◽  
Computer Aided Design ◽  
Fluid Dynamic ◽  
Three Dimensional ◽  
Centrifugal Pumps ◽  
Design And Optimization ◽  
Design Software ◽  
And Performance ◽  
Aided Design ◽  
Physical Phenomena

Improvement in computer power and the development of numerical computational methods over the last few years have allowed the emergence of computational fluid dynamic (CFD) codes, making possible the numerical simulation of flow and energy transfer in turbomachines. To improve the efficiency of these tools, fast design software must be used. Within the framework of the optimization process of centrifugal pumps, HELIOX software was developed. It is a tool for design and performance analysis of centrifugal pumps. HELIOX allows quick design of new pumps and improvement of existing ones. HELIOX's performance analysis has been validated through many industrial cases: approximately 100 machines of different sizes and mechanical power. Heliox can be linked to quasi-and three-dimensional analysis tools; these tools enable a better understanding of physical phenomena so as to control the flow fields inside pumps.

scholarly journals Applicability of Formwork Automation Design Software for Aluminum Formwork

2020 ◽  
Vol 10 (24) ◽  
pp. 9029
Author(s):  
Bokyeong Lee ◽  
Hyeonggil Choi ◽  
Byongwang Min ◽  
Dong-Eun Lee
Keyword(s):  
Computer Aided Design ◽  
Building Information Modeling ◽  
Three Dimensional ◽  
Simple Algorithm ◽  
Information Modeling ◽  
Two Dimensional ◽  
Building Information ◽  
Design Software ◽  
Modeling Data ◽  
Aided Design

In this study, by applying the developed formwork automation design software to three target structures, we reviewed the applicability of the formwork automation design software for the aluminum formwork. To apply the formwork automation design software, we built an aluminum formwork library based on the conversion of two-dimensional (2D) computer-aided design (CAD) data to three-dimensional building information modeling data for all the components of the aluminum formwork. The results of the automated formwork layout on the target structures using the formwork automation design software confirmed that the wall and deck members were laid out by the set algorithm according to the formwork size and direction. However, because of the limited functionality of the software, the level of completion of the formwork layout was found to be lower than that of the manual formwork layout based on 2D CAD data. The currently developed software is based on a simple algorithm, but has a drawback in that the automated layout is limited to only some of its members. Therefore, additional research should be conducted on the development of advanced software through the diversification of the algorithm, automation of preprocessing of the mesh, and analysis of the relationships of all the members comprising the formwork.

Design with Depth

2005 ◽  
Vol 127 (12) ◽  
pp. 32-34
Author(s):  
Jean Thilmany
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
3D Design ◽  
Computer Aided ◽  
University Professor ◽  
Business Web ◽  
Design Software ◽  
Computer Monitors ◽  
Web Surfing ◽  
Aided Design

This article discusses that how mechanical engineers will pair their already-familiar computer-aided design software with not-so-familiar three-dimensional (3D) displays for true 3D design. This is in accordance to a number of vendors' intent on supplying the newfangled computer monitors, within the next two decades. Although some of the devices are already on the market, affordable 3D monitors and displays seem to be more than a decade away, according to one university professor at work on such a project. Widespread adoption is still hindered by factors such as cost, software availability, and lack of a mouse-like device needed to interact with what’s on screen. Over the past 25 years, mechanical engineers have witnessed evolutionary change in design methods-from pen and paper to two-dimensional software and now to 3-D computer-aided design. While software makers have stepped up with sleeker and faster modeling capabilities, visualization lags. Computer users two decades out will carry out all business, web surfing, and gaming on 3-D displays. That next generation may well find the very idea of 2-D monitors to be as dated as record albums seem to teenagers today.

Analysis of Computer-Aided Design Software Used in Home Textiles of Digital Design

2015 ◽  
Vol 751 ◽  
pp. 293-297
Author(s):  
Bin Feng ◽  
Hai Lian Deng ◽  
Li Ping Yang
Keyword(s):  
Computer Aided Design ◽  
Purchase Intention ◽  
Three Dimensional ◽  
Digital Design ◽  
Textile Design ◽  
Software Application ◽  
Computer Aided ◽  
Consumer Purchase Intention ◽  
Design Software ◽  
Aided Design

This paper will discuss computer-aided design software use in textile design, from the development of computer-aided design applications and home textiles design, software is the core of computer-aided design in textile design, graphic combined with three-dimensional software, building the systematic of home textiles design and computer-aided design to enhance the artistic beauty of textile design. Secondly, introduce the two-dimensional and three-dimensional software application in fabric pattern and textile design. We can see the convenience of computer-aided design, which combines technology and art in one. And from the comparison of plane and solid software, both proposed to build a systematic mutual, for textile design, which is based on the performance requirements and the effect of artistic design, and the theoretical analysis of consumer purchase intention and behavior; and discussing from the beauty of color、 formal and spatial three aspects of computer-aided design to enhance the artistic beauty of textile design.

The development of a low-cost three-dimensional printed shoulder, arm, and hand prostheses for children

2016 ◽  
Vol 41 (2) ◽  
pp. 205-209 ◽  
Author(s):  
Jorge M Zuniga ◽  
Adam M Carson ◽  
Jean M Peck ◽  
Thomas Kalina ◽  
Rakesh M Srivastava ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Low Cost ◽  
Three Dimensional ◽  
Cost Effective ◽  
Research Participant ◽  
The Body ◽  
Shoulder Prosthesis ◽  
Main Function ◽  
And Performance ◽  
Aided Design

Background and aim: The prosthetic options for higher level amputees are limited and costly. Advancements in computer-aided design programs and three-dimensional printing offer the possibility of designing and manufacturing transitional prostheses at very low cost. The aim of this project was to describe an inexpensive three-dimensional printed mechanical shoulder prosthesis to assist a pre-selected subject in performing bi-manual activities. Technique: The main function of the body-powered, manually adjusted three-dimensional printed shoulder prosthesis is to provide a cost-effective, highly customized transitional device to individuals with congenital or acquired forequarter amputations. Discussion: After testing the prototype on a young research participant, a partial correction of the patient’s spinal deviation was noted due to the counterweight of the device. The patient’s family also reported improved balance and performance of some bimanual activities after 2 weeks of using the device. Limitations of the design include low grip strength and low durability. Clinical relevance The prosthetic options for higher level amputees are limited and costly. The low-cost three-dimensional printed shoulder prosthesis described in this study can be used as a transitional device in preparation for a more sophisticated shoulder prosthesis.

scholarly journals Three-Dimensional Simulator: Training for the Novices in Embolization With Liquid Agents

2021 ◽  
Author(s):  
Michal Matyjas ◽  
Marius Sauerbrey ◽  
Michael Scheel
Keyword(s):  
Standard Deviation ◽  
Confidence Level ◽  
Work Experience ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Simulator Training ◽  
Training Performance ◽  
Design Software ◽  
Aided Design ◽  
Post Hoc

Abstract Background: To design the simulator for novices without prior experience in embolization with liquid agents such as n-Butyl cyanoacrylate (n-BCA) and to evaluate the simulator using surveys and post hoc video analysis. Materials and Methods: The simulator was created using computer-aided design software and three-dimensionally printed. Before an embolization, trainees had filled the questionnaires regarding their level of expertise and self-reported confidence level. The participants were divided into the novice or the expert groups, were shown an instruction video, and each performed four embolizations. Subsequently, they completed the surveys on self-reported confidence level and assessed the simulator’s face and content validities.Results: 5 experts and 12 novices trained on the simulator. The experts were radiology fellows with at least five years of work experience. The novices were medical students and radiology residents in postgraduate years one and three, without any previous experience with embolization. Based on the surveys, the experts assessed the simulator as very useful for embolization training. Performance, e.g. mean duration embolization between experts (mean ± standard deviation = 189 ± 42 seconds) and novices (mean ± standard deviation = 235 ± 66 seconds) were significantly different (p = .001). The embolization, simulated complications, and educational capabilities of the simulator were evaluated positively. The self-reported confidence level rose by a mean of over two points, using the 5-point Lickert scale, in the novice group (p < .001).Conclusion: The liquid embolization simulator is an educational tool, mimicking embolization. It reduces the duration of embolization and improves the confidence level of the novices significantly.

scholarly journals Design and Development of Unmanned Hovercraft

2019 ◽  
Vol 4 (5) ◽  
pp. 1180-1195 ◽  
Author(s):  
Surendar Ganesan ◽  
Balasubramanian Esakki
Keyword(s):  
Performance Studies ◽  
Pollution Control ◽  
Computer Aided Design ◽  
Fluid Dynamic ◽  
Internal Flow ◽  
Prototype Model ◽  
Cad Model ◽  
Cfd Analysis ◽  
And Performance ◽  
Aided Design

The present study focuses on the development and performance analysis of unmanned hovercraft. The inherent characteristics of hovercraft such as hovering and gliding on diverse surfaces like water and land are intended for pollution control in remote water bodies. The vehicle is designed with bag skirt configuration for ease and smooth functioning on multiple terrains. Computer Aided Design (CAD) model with incorporation of spraying mechanism as a payload is conceptualized. Computational Fluid Dynamic (CFD) analysis at internal flow condition is performed and bag pressure of the skirt is assessed. The prototype model of vehicle to accommodate a payload of 0.8kg is fabricated from suitable lightweight materials and the experiments are conducted to explore the desired operation of hovering and forward thrust systems. The performance studies are made with velocity component in linear direction on land and water surfaces.

scholarly journals The Development and Effects of Teaching Perspective Free-Hand Sketching in Engineering Design

2016 ◽  
Author(s):  
Ethan Hilton ◽  
Wayne Li ◽  
Sunni H. Newton ◽  
Meltem Alemdar ◽  
Raghuram Pucha ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Idea Generation ◽  
Final Design ◽  
Engineering Drawings ◽  
Design Software ◽  
Aided Design ◽  
Design Ideas ◽  
Three Dimensional Space

As Computer-Aided Design software has become more advanced, the use of hand-drawn engineering drawings has greatly diminished. This reduction has led to free-hand sketching becoming less emphasized in engineering education. While many engineering curriculums formerly included courses dedicated entirely to sketching and hand drafting, these topics are no longer addressed by most current curriculums. However, it has been observed that sketching has many benefits including improved communication in the design process, idea generation exercises, and visualizing design ideas in three-dimensional space. While isometric sketching has long been the preferred method in engineering curriculums, there are benefits of teaching perspective sketching including the creation of more realistic sketches for communication and idea generation. This paper presents the development of a perspective-based sketching curriculum and the study of how this method compares to more traditional methods of teaching sketching to students in a freshman level engineering graphics course. The results show that the perspective-based sketching method leads to equivalent gains in spatial visualization skills and final design self-efficacy as the traditional method of teaching hand sketching. While maintaining these skills, the new method also taught students additional skills. Through surveys and interviews, the students expressed that these skills would be useful to them in their future coursework and careers.

TCAD SIMULATION AND PERFORMANCE ANALYSIS OF SINGLE AND DUAL GATE OTFTs

2019 ◽  
Vol 27 (05) ◽  
pp. 1950145 ◽  
Author(s):  
A. D. D. DWIVEDI ◽  
POOJA KUMARI
Keyword(s):  
Performance Analysis ◽  
Computer Aided Design ◽  
Simulation Software ◽  
Electrical Characteristics ◽  
Organic Thin Film ◽  
Dual Gate ◽  
Tcad Simulation ◽  
Numerical Device ◽  
And Performance ◽  
Aided Design

This paper presents finite element-based numerical simulation and performance analysis of dual and single gate pentacene-based organic thin film transistors (OTFTs) using technology computer-aided design (TCAD) tools. Electrical characteristics of the devices have been simulated using 2D numerical device simulation software ATLAS™ from Silvaco International. Also, device parameters like threshold voltage, mobility, transconductance, subthreshold swing and current on/off ratio of the single and dual gate OTFTs have been extracted and compared.

Laser milling

2002 ◽  
Vol 216 (5) ◽  
pp. 657-667 ◽  
Author(s):  
D T Pham ◽  
S S Dimov ◽  
P V Petkov ◽  
S P Petkov
Keyword(s):  
Computer Aided Design ◽  
Nickel Alloys ◽  
Three Dimensional ◽  
Hardened Steel ◽  
Advantages And Disadvantages ◽  
Laser Milling ◽  
Wide Range ◽  
Aided Design ◽  
Physical Phenomena ◽  
Complex Parts

Laser milling is a new manufacturing process that has attracted much attention from engineers and researchers for the last decade. The process allows complex parts and tooling inserts to be fabricated directly from three-dimensional computer aided design (CAD) data in a wide range of advanced engineering materials such as ceramics, hardened steel, titanium and nickel alloys. The paper starts with a description of the physical phenomena underlying the process and the factors influencing its performance. It then outlines the machining techniques that can be utilized in laser milling. The paper concludes with a discussion of the advantages and disadvantages of the process and a summary of its application areas.

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