scholarly journals Establishment and application of three-dimensional realistic river terrain in the numerical modeling of flow over spillways

2017 ◽  
Vol 18 (1) ◽  
pp. 119-129
Author(s):  
Lan Qi ◽  
Hui Chen ◽  
Xiao Wang ◽  
Wencai Fei ◽  
Donghai Liu
Keyword(s):  
Numerical Modeling ◽  
Spatial Distribution ◽  
River Flow ◽  
Three Dimensional ◽  
River Channel ◽  
Computer Aided ◽  
Scour Hole ◽  
Engineering Problems ◽  
Upstream Reservoir ◽  
Interactive Application

Abstract We present an integrated three-dimensional (3D) spillway model where the realistic and complicated river terrain is implemented by the platform CATIA (Computer Aided Three Dimensional Interactive Application). This integrated 3D spillway model allows for complicated topographic and geomorphic conditions and describes the spatial distribution of the spillway dam (upstream reservoir, downstream river channel and the spillway dam itself) precisely, thus making it a real alternative to the physical model. Furthermore, this model provides the premise and possibility of a full-scale simulation of the spillway flow, that is, it can not only be used to study the hydraulics on the spillway face, but also can be used to study the hydraulics along the downstream river channel and estimate the scour problem associated with both the spillway flow and downstream river channel. In this model, turbulence was simulated using RNG k−ɛ equations. The flow velocity and surface pressure from the numerical model were verified by the data from experiments. Moreover, the river flow was studied and flow velocities downstream were obtained. The scour formed downstream of a ski-jump was also studied in this study on the location and shape of a scour hole. In all, this study provides new approaches for solving relevant hydraulic engineering problems.

Assessment and virtual redesign of a manual handling workstation by computer-aided three-dimensional interactive application

2016 ◽  
Vol 23 (2) ◽  
pp. 169-174 ◽  
Author(s):  
Mansour Ziaei ◽  
Hojjat Ziaei ◽  
Seyed Younes Hosseini ◽  
Faramarz Gharagozlou ◽  
Ali Akbar Keikhamoghaddam ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Computer Aided ◽  
Interactive Application ◽  
Manual Handling

scholarly journals ANALISIS KEKUATAN MEKANIK DESAIN BEJANA MOLECULAR SIEVE

2020 ◽  
Vol 24 (1) ◽  
pp. 44
Author(s):  
Dedy Haryanto ◽  
Ainur Rosidi ◽  
G. Bambang Heru K ◽  
Giarno Giarno ◽  
Joko P. Witoko
Keyword(s):  
Molecular Sieve ◽  
Three Dimensional ◽  
Translational Displacement ◽  
Computer Aided ◽  
Interactive Application ◽  
Ss 304

ANALISIS KEKUATAN MEKANIK DESAIN BEJANA MOLECULAR SIEVE. Reaktor Daya Eksperimental (RDE) menggunakan bahan bakar bola (pebble) dan gas helium sebagai pendingin primernya. Untuk mempertahankan dan menjaga kualitas helium sebagai pendingin sesuai persyaratannya maka dirancang fasilitas Sistem Pemurnian Helium (SPH). Salah satu bagian dari komponen utama fasilitas Sistem Pemurnian Helium ini adalah bejana molecular sieve. Fungsi dari molecular sieve ini untuk menyerap gas CO2, CH4, dan H2O. Tujuan penelitian ini adalah untuk mengetahui kemampuan kekuatan mekanik dari bejana molecular sieve melalui simulasi menggunakan software Computer Aided Three-dimensional Interactive Application (CATIA). Tahapan yang dilakukan dalam menganalisis kekuatan mekanik desain molecular sieve meliputi : pembuatan model 3-dimensi, memasukkan data sifat mekanik material SS304, serta mensimulasikan pengoperasian pada tekanan uji dan temperatur bervariasi. Pada tekanan 30 bar dan temperatur 120 °C tegangan mekanik yang dihasilkan sebesar 4,4608 x 107 N/m2 lebih kecil daripada yield strenght material SS 304 dan berada di daerah elastis material. Sedangkan translational displacement sebesar 1,1375 mm sangat kecil jika dibandingkan dengan dimensi bejana molecular sieve sehingga tidak mengakibatkan perubahan bentuk. Dengan demikian bejana molecular sieve aman untuk dioperasikan guna mendukung penelitian pemurnian helium Kata kunci: bejana molecular sieve, tegangan mekanik, translational displacement, CATIA

scholarly journals Design and Development of Sheet-Metal Elbows Using Programming with Visual Basic for Applications in CATIA

Symmetry ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 33
Author(s):  
José Ignacio Rojas-Sola ◽  
Gloria del Río-Cidoncha ◽  
Rafael Ortíz-Marín ◽  
José María López-Pedregal
Keyword(s):  
Three Dimensional ◽  
Visual Basic ◽  
Surface Design ◽  
Metal Fabrication ◽  
Visual Basic For Applications ◽  
Computer Aided ◽  
Dimensional Parameters ◽  
Interactive Application ◽  
Design Software ◽  
3D Representation

This article introduces an innovative application of Visual Basic for Applications (VBA) (Visual Basic macro language) developed in CATIA (Computer-Aided Three-Dimensional Interactive Application), computer-aided manufacturing and engineering design software. Said application enables the three-dimensional (3D) representation and development to be obtained on a plane of the surfaces of cylindrical and conical elbows utilised to join two conduits, since CATIA lacks tools for the design of elements of metal fabrication. The application permits the geometric and dimensional parameters necessary for the creation and development of the analysed elbows to be introduced via a keyboard. Once these values have been entered and it has been verified that the design of the elbow is possible, then the application is programmed within the CATIA “Wireframe and Surface Design” module to obtain the 3D representation of said elbows, and the development of their surface is projected in the CATIA “Drafting” module. Consequently, the incorporation of this tool into CATIA software could increase technical-design productivity by eliminating certain intermediate operations, such as symmetry, and through improving the geometry training of less skilled users.

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.

Three-Dimensional Subcellular Organization of Hepatocytes in Intact Liver: Simultaneous Visualization of Cytoskeletal and Membrane Markers by Confocal Microscopy

1996 ◽  
Vol 54 ◽  
pp. 288-289
Author(s):  
Greg V. Martin ◽  
Ann L. Hubbard
Keyword(s):  
Three Dimensional ◽  
Integral Membrane Proteins ◽  
Polarized Secretion ◽  
Microscope Images ◽  
Computer Aided ◽  
Intracellular Organelles ◽  
Cytoskeletal Elements ◽  
Simultaneous Visualization

The microtubule (MT) cytoskeleton is necessary for many of the polarized functions of hepatocytes. Among the functions dependent on the MT-based cytoskeleton are polarized secretion of proteins, delivery of endocytosed material to lysosomes, and transcytosis of integral plasma membrane (PM) proteins. Although microtubules have been shown to be crucial to the establishment and maintenance of functional and structural polarization in the hepatocyte, little is known about the architecture of the hepatocyte MT cytoskeleton in vivo, particularly with regard to its relationship to PM domains and membranous organelles. Using an in situ extraction technique that preserves both microtubules and cellular membranes, we have developed a protocol for immunofluorescent co-localization of cytoskeletal elements and integral membrane proteins within 20 µm cryosections of fixed rat liver. Computer-aided 3D reconstruction of multi-spectral confocal microscope images was used to visualize the spatial relationships among the MT cytoskeleton, PM domains and intracellular organelles.

scholarly journals Automatized Evaluation of Students’ CAD Models

2021 ◽  
Vol 11 (4) ◽  
pp. 145
Author(s):  
Nenad Bojcetic ◽  
Filip Valjak ◽  
Dragan Zezelj ◽  
Tomislav Martinec
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Computer Application ◽  
Test Cases ◽  
Cad Model ◽  
Computer Solution ◽  
3D Cad ◽  
Computer Aided ◽  
Cad Models ◽  
Aided Design

The article describes an attempt to address the automatized evaluation of student three-dimensional (3D) computer-aided design (CAD) models. The driving idea was conceptualized under the restraints of the COVID pandemic, driven by the problem of evaluating a large number of student 3D CAD models. The described computer solution can be implemented using any CAD computer application that supports customization. Test cases showed that the proposed solution was valid and could be used to evaluate many students’ 3D CAD models. The computer solution can also be used to help students to better understand how to create a 3D CAD model, thereby complying with the requirements of particular teachers.

Novel three-dimensional multi-objective numerical modeling for hot strip tandem rolling

2021 ◽  
Author(s):  
Lianjie Li ◽  
Jianxin Li ◽  
Haibo Xie ◽  
Hongqiang Liu ◽  
Li Sun ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Three Dimensional ◽  
Multi Objective ◽  
Hot Strip
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