CFD Challange: Solutions Obtained Using Two Commercial Finite Volume Solvers, Fluent and STAR-CCM+

2012 ◽  
Author(s):  
J. A. Costelloe ◽  
L. D. Browne ◽  
A. G. Lynch ◽  
L. Morris ◽  
M. T. Walsh
Keyword(s):  
Finite Volume ◽  
Patient Specific ◽  
Ansys Fluent ◽  
Cardiovascular Hemodynamics ◽  
The Past ◽  
Software Packages ◽  
The University

The CABER group is based at the University of Limerick and for the past 15 years has primarily focused on cardiovascular hemodynamics research. A key element of the group’s research has always been in the application of CFD to idealized and patient specific geometries. Recently the group has changed commercial CFD software’s and so currently has access to 2 packages, Star-CCM+ 6.02.007 and Ansys Fluent 12.1.4. For this challenge it was therefore decided to compare both software packages and also to examine variability between users. The Fluent simulations were conducted by postgraduate researcher Adrian Lynch and the Star CCM software was utilized independently by postgraduate researchers Jennifer Costello and Leonard Browne.

SBC2012 CFD Challange: Computational Hemodynamics of Intracranial Aneurysm Using the Finite Volume Solver Ansys Fluent

2012 ◽  
Author(s):  
Vitaly O. Kheyfets ◽  
Ender A. Finol
Keyword(s):  
Intracranial Aneurysm ◽  
Finite Volume ◽  
Biomedical Engineering ◽  
San Antonio ◽  
Cfd Simulations ◽  
Ansys Fluent ◽  
Computational Hemodynamics ◽  
University Of Texas ◽  
The University

The Vascular Biomechanics and Biofluids Laboratory is located in the Department of Biomedical Engineering at the University of Texas at San Antonio. The laboratory operates under the direction of Prof. Ender A. Finol, who has been working in computational hemodynamics for nearly a decade. For this challenge, the CFD simulations were performed by post-doctoral fellow Vitaly O. Kheyfets using the CFD solver Ansys Fluent v13 (Canonsburg, PA).

Novae in the Magellanic Clouds

1979 ◽  
Vol 46 ◽  
pp. 96-101
Author(s):  
J.A. Graham
Keyword(s):  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Magellanic Clouds ◽  
University Of Michigan ◽  
The Past ◽  
Spectroscopic Information ◽  
Objective Prism ◽  
The University ◽  
Small Cloud ◽  
Low Dispersion

During the past several years, a systematic search for novae in the Magellanic Clouds has been carried out at Cerro Tololo Inter-American Observatory. The Curtis Schmidt telescope, on loan to CTIO from the University of Michigan is used to obtain plates every two weeks during the observing season. An objective prism is used on the telescope. This provides additional low-dispersion spectroscopic information when a nova is discovered. The plates cover an area of 5°x5°. One plate is sufficient to cover the Small Magellanic Cloud and four are taken of the Large Magellanic Cloud with an overlap so that the central bar is included on each plate. The methods used in the search have been described by Graham and Araya (1971). In the CTIO survey, 8 novae have been discovered in the Large Cloud but none in the Small Cloud. The survey was not carried out in 1974 or 1976. During 1974, one nova was discovered in the Small Cloud by MacConnell and Sanduleak (1974).

The consolidation of microscopy technology into a university research support facility: Reflections on the 1980's and projections for the 1990's at the university of iowa

1993 ◽  
Vol 51 ◽  
pp. 476-477
Author(s):  
Kenneth C. Moore
Keyword(s):  
Laser Scanning ◽  
Freeze Fracture ◽  
Freeze Substitution ◽  
Research Support ◽  
University Of Iowa ◽  
Staff Members ◽  
The Past ◽  
Research Grade ◽  
The University ◽  
Support Facility

The University of Iowa Central Electron Microscopy Research Facility(CEMRF) was established in 1981 to support all faculty, staff and students needing this technology. Initially the CEMRF was operated with one TEM, one SEM, three staff members and supported about 30 projects a year. During the past twelve years, the facility has replaced all instrumentation pre-dating 1981, and now includes 2 TEM's, 2 SEM's, 2 EDS systems, cryo-transfer specimen holders for both TEM and SEM, 2 parafin microtomes, 4 ultamicrotomes including cryoultramicrotomy, a Laser Scanning Confocal microscope, a research grade light microscope, an Ion Mill, film and print processing equipment, a rapid cryo-freezer, freeze substitution apparatus, a freeze-fracture/etching system, vacuum evaporators, sputter coaters, a plasma asher, and is currently evaluating scanning probe microscopes for acquisition. The facility presently consists of 10 staff members and supports over 150 projects annually from 44 departments in 5 Colleges and 10 industrial laboratories. One of the unique strengths of the CEMRF is that both Biomedical and Physical scientists use the facility.

The Tower Mill: An archaeological excavation of Queensland's oldest extant building

1996 ◽  
Vol 10 ◽  
pp. 1 ◽  
Author(s):  
Jay Hall ◽  
Jonathan Prangnell ◽  
Bruno David
Keyword(s):  
City Council ◽  
Archaeological Excavation ◽  
The Past ◽  
History Of ◽  
The University

The Tower Mill, Brisbane's oldest extant building, was excavated by the University of Queensland to determine for the Brisbane City Council the heritage potential of surrounding subsurface deposits.  Following the employment of GPR, excavation revealed interesting stratifications, features and artefacts.  Analysis permits an explanation for these deposits which augment an already fascinating history of the site's use over the past 170 years or so.

RESEARCH COLLABORATION AMONG LIBRARY AND INFORMATION SCIENCE SCHOOLS IN SOUTH AFRICA (1991–2012): AN INFORMETRICS STUDY

Mousaion ◽  
2017 ◽  
Vol 34 (3) ◽  
pp. 36-59 ◽  
Author(s):  
Jan R. Maluleka ◽  
Omwoyo B. Onyancha
Keyword(s):  
South Africa ◽  
Information Science ◽  
Research Collaboration ◽  
Science And Technology ◽  
Library And Information Science ◽  
Limited Extent ◽  
Microsoft Excel ◽  
The Past ◽  
Software Packages ◽  
Collaborative Activities

This study sought to assess the extent of research collaboration in Library and Information Science (LIS) schools in South Africa between 1991 and 2012. Informetric research techniques were used to obtain relevant data for the study. The data was extracted from two EBSCO-hosted databases, namely, Library and Information Science Source (LISS) and Library, Information Science and Technology Abstracts (LISTA). The search was limited to scholarly peer reviewed articles published between 1991 and 2012. The data was analysed using Microsoft Excel ©2010 and UCINET for Windows ©2002 software packages. The findings revealed that research collaboration in LIS schools in South Africa has increased over the past two decades and mainly occurred between colleagues from the same department and institution; there were also collaborative activities at other levels, such as inter-institutional and inter-country, although to a limited extent; differences were noticeable when ranking authors according to different computations of their collaborative contributions; and educator-practitioner collaboration was rare. Several conclusions and recommendations based on the findings are offered in the article.

History Teaching in Rural Areas: The University of Venda

1996 ◽  
Vol 24 (1) ◽  
pp. 17-23
Author(s):  
Alan Kirkaldy
Keyword(s):  
Rural Areas ◽  
Whole Body ◽  
Social Forces ◽  
Historical Writing ◽  
Social Formation ◽  
History Teaching ◽  
The Past ◽  
The Social ◽  
The University

I would argue that history students should understand that the whole body of historical writing consists of interpretations of the past. They should be able to analyse a wide variety of texts and form their own opinions on a historical topic, and should be able to construct a coherent argument, using evidence to support their opinion. In doing so, they should be actively aware that their argument is no more “true” than that offered by any other historian. It is as much a product of their personal biography and the social formation in which they live as of the evidence used in its construction. Even this evidence is the product of other personal biographies and other social forces.

scholarly journals Prediction of 3D Cardiovascular hemodynamics before and after coronary artery bypass surgery via deep learning

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Gaoyang Li ◽  
Haoran Wang ◽  
Mingzi Zhang ◽  
Simon Tupin ◽  
Aike Qiao ◽  
...  
Keyword(s):  
Deep Learning ◽  
Artery Bypass ◽  
Computational Cost ◽  
Specific Model ◽  
Arterial System ◽  
Patient Specific ◽  
Cardiovascular Hemodynamics ◽  
Before And After ◽  
Deep Learning Network ◽  
Cfd Method

AbstractThe clinical treatment planning of coronary heart disease requires hemodynamic parameters to provide proper guidance. Computational fluid dynamics (CFD) is gradually used in the simulation of cardiovascular hemodynamics. However, for the patient-specific model, the complex operation and high computational cost of CFD hinder its clinical application. To deal with these problems, we develop cardiovascular hemodynamic point datasets and a dual sampling channel deep learning network, which can analyze and reproduce the relationship between the cardiovascular geometry and internal hemodynamics. The statistical analysis shows that the hemodynamic prediction results of deep learning are in agreement with the conventional CFD method, but the calculation time is reduced 600-fold. In terms of over 2 million nodes, prediction accuracy of around 90%, computational efficiency to predict cardiovascular hemodynamics within 1 second, and universality for evaluating complex arterial system, our deep learning method can meet the needs of most situations.

Effect of Slit Inclusions in Drag Reduction of Flow over Cylinders

2016 ◽  
Vol 846 ◽  
pp. 18-22
Author(s):  
Rohit Bhattacharya ◽  
Abouzar Moshfegh ◽  
Ahmad Jabbarzadeh
Keyword(s):  
Fluid Flow ◽  
Drag Reduction ◽  
Drag Coefficient ◽  
Finite Volume ◽  
Lattice Boltzmann ◽  
Circular Cross Section ◽  
Finite Volume Methods ◽  
Turbulent Regime ◽  
Ansys Fluent ◽  
Comparison Of The Results

The flow over bluff bodies is separated compared to the flow over streamlined bodies. The investigation of the fluid flow over a cylinder with a streamwise slit has received little attention in the past, however there is some experimental evidence that show for turbulent regime it reduces the drag coefficient. This work helps in understanding the fluid flow over such cylinders in the laminar regime. As the width of the slit increases the drag coefficient keeps on reducing resulting in a narrower wake as compared to what is expected for flow over a cylinder. In this work we have used two different approaches in modelling a 2D flow for Re=10 to compare the results for CFD using finite volume method (ANSYS FLUENTTM) and Lattice Boltzmann methods. In all cases cylinders of circular cross section have been considered while slit width changing from 10% to 40% of the cylinder diameter. . It will be shown that drag coefficient decreases as the slit ratio increases. The effect of slit size on drag reduction is studied and discussed in detail in the paper. We have also made comparison of the results obtained from Lattice Boltzmann and finite volume methods.

scholarly journals Steroid Sulphatase and Its Inhibitors: Past, Present and Future

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2852
Author(s):  
Paul A. Foster
Keyword(s):  
Good Evidence ◽  
The Past ◽  
Steroid Sulphatase ◽  
University Of Oxford ◽  
Therapeutic Value ◽  
Breast And Prostate Cancer ◽  
The University ◽  
Further Development ◽  
Hydrolysis Of

Steroid sulphatase (STS), involved in the hydrolysis of steroid sulphates, plays an important role in the formation of both active oestrogens and androgens. Since these steroids significantly impact the proliferation of both oestrogen- and androgen-dependent cancers, many research groups over the past 30 years have designed and developed STS inhibitors. One of the main contributors to this field has been Prof. Barry Potter, previously at the University of Bath and now at the University of Oxford. Upon Prof. Potter’s imminent retirement, this review takes a look back at the work on STS inhibitors and their contribution to our understanding of sulphate biology and as potential therapeutic agents in hormone-dependent disease. A number of potent STS inhibitors have now been developed, one of which, Irosustat (STX64, 667Coumate, BN83495), remains the only one to have completed phase I/II clinical trials against numerous indications (breast, prostate, endometrial). These studies have provided new insights into the origins of androgens and oestrogens in women and men. In addition to the therapeutic role of STS inhibition in breast and prostate cancer, there is now good evidence to suggest they may also provide benefits in patients with colorectal and ovarian cancer, and in treating endometriosis. To explore the potential of STS inhibitors further, a number of second- and third-generation inhibitors have been developed, together with single molecules that possess aromatase–STS inhibitory properties. The further development of potent STS inhibitors will allow their potential therapeutic value to be explored in a variety of hormone-dependent cancers and possibly other non-oncological conditions.

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