Interfacing Virtual Reality, CFD and the Internet

1997 ◽  
Author(s):  
David J. Freeman
Keyword(s):  
Fluid Dynamics ◽  
Virtual Reality ◽  
The Internet ◽  
Parallel Processor ◽  
Computing Power ◽  
Numerical Predictions ◽  
Computational Fluid Dynamics Cfd ◽  
Software And Hardware ◽  
Time Required ◽  
The Cost

Computational Fluid Dynamics (CFD) is a valuable tool for the process and petroleum industries. CFD reduces development timescales and costs by replacing expensive and lengthy laboratory investigation with numerical predictions of processes. However, there are several reasons why some companies are unwilling to use CFD. These include the cost of the software and hardware, the need for in-house CFD expertise and the time required to solve complex simulations. CHAM has developed a solution to these problems, in the form of a Virtual Reality Interface linked via the Internet to powerful parallel-processor computers. Virtual reality makes CFD accessible to non-CFD experts and allows the engineer to concentrate on the solution of his problem. Remote computing makes it possible to access from a PC the necessary computing power to solve the problem. Several examples will be shown, demonstrating the application and benefits of the PHOENICS-VR interface and the advantages of remote computing to the process and petroleum industries.

scholarly journals Special Issue on “CFD Based Researches and Applications for Fluid Machinery and Fluid Device”

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1137
Author(s):  
Jin-Hyuk Kim ◽  
Sung-Min Kim ◽  
Minsuk Choi ◽  
Lei Tan ◽  
Bin Huang ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Power System ◽  
Special Issue ◽  
Numerical Techniques ◽  
Fluid Machinery ◽  
Computing Power ◽  
Computational Fluid Dynamics Cfd

The demand for computational fluid dynamics (CFD)-based numerical techniques is increasing rapidly with the development of the computing power system [...]

Appearances

The Age of Em ◽  
2016 ◽  
Author(s):  
Robin Hanson
Keyword(s):  
Virtual Reality ◽  
Virtual Environment ◽  
Video Game ◽  
Careful Examination ◽  
Worker Productivity ◽  
Computing Power ◽  
Fine Grain ◽  
Physical Environments ◽  
Virtual Realities ◽  
The Cost

What kind of world do ems see? We have several reasons to expect ems to usually experience simulated “virtual” realities. First, compared with ordinary humans, it is easier to fully immerse ems in computer-generated virtual realities. One could feed computed inputs into an em’s emulated eyes, ears, nose, fingers, etc., and take outputs from that em’s emulated arms, legs, tongue, etc., to create a complete sensory experience of the sight, sound, smell, touch, etc., of being in contact with and partially controlling a constructed but vivid world. Humans get many sensory clues telling them that their virtual realities are not real. Ems need see no such clues. Second, the cost to compute a workable virtual reality can be very low, compared with the cost to compute an em. Now it is true that the cost to compute a virtual environment depends greatly on the level of realistic detail required. Consider the cost to give simulated inputs to an em that it could not distinguish, even with careful examination, from a real physical environment. For many familiar physical environments, such a simulation may cost many times the cost of running the emulation brain itself. However, humans today are routinely comfortable and moderately productive interacting with video game environments that require vastly less computing power than human-speed brain emulations will require. Also, instead of sending very fine-grain low-level signals of very particular sights and sounds, it may become possible to send cheaper-to-compute higherlevel signals that em brains interpret as their having seen the lower-level signals. For example, instead of sending individual light pixels to the eye, which then translates that to lines and areas, one might just send those lines and areas to the appropriate emulated neurons. Ems may prefer virtual reality environments that are expensive to compute, relative to the cost of running the ems themselves. Even so, cheaply computed environments seem sufficient to functionally support the vast majority of em activities, in both work and leisure. On the job, there is a tradeoff regarding whether to pay more for a more realistic virtual environment that might add to worker productivity.

The use of computational fluid dynamics (CFD). Technique for evaluating the efficiency of an activated sludge reactor

1999 ◽  
Vol 39 (10-11) ◽  
pp. 329-332 ◽  
Author(s):  
A. B. Karama ◽  
O. O. Onyejekwe ◽  
C. J. Brouckaert ◽  
C. A. Buckley
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Wastewater Treatment ◽  
Activated Sludge ◽  
Wastewater Treatment Plants ◽  
Computational Techniques ◽  
Activated Sludge Reactor ◽  
Computational Fluid Dynamics Cfd ◽  
The Cost ◽  
New Generation

Adequate models for wastewater treatment are limited by the cost of constructing them. Many a time, studies carried out on wastewater treatment plants have not been very useful in enhancing their performance. As a result, numerous mathematical models presented by different researchers on sedimentation tanks and clarifiers have not been getting much attention. Recently, improvement in computers and computational techniques have led to the development of a new generation of highly efficient programs for simulating real fluid flow within any type of geometry including clarifiers and activated sludge reactors. Herein, a computational fluid dynamics code, PHOENICS, is used to determine the performance of an anaerobic zone in an activated sludge reactor. Plausible results were achieved when experimental data were compared with numerical results.

scholarly journals Comparison of the heat for rectangular and circle salt boiling stove in Ban Dung area, Udon Thani Province.

2018 ◽  
Vol 192 ◽  
pp. 02031
Author(s):  
Aphichat Srichat ◽  
Ponthep Vengsungnle ◽  
Kaweepongt Hongtong ◽  
Weeraphon Kaewka ◽  
Jarinee Jongpluempiti
Keyword(s):  
Fluid Dynamics ◽  
Thermal Efficiency ◽  
Thermal Parameter ◽  
Sectional Area ◽  
Cross Sectional ◽  
Hot Air ◽  
Boiling Process ◽  
Computational Fluid Dynamics Cfd ◽  
Flow Through ◽  
The Cost

This research aims a study to compare the thermal parameter of the original (rectangular) and circle salt boiling stove by computational fluid dynamics (CFD) of the boiling salt process in Ban Dung area, Udon Thani province. The first study, the rectangular stove has U-shaped channel for heating flow through chimney that the stove size is 2.4 m of width, 6.0 m of long, 0.8 m of high and cross-sectional area of heating flue was 0.8 x 0.8 m2. The second study, the circle salt boiling stove has a similarly volume of the rectangular stove of 4.32 m3 and the diameter of 4.58 m. From the results of mathematical models by CFD found that the rectangular stove have the thermal efficiency, the highest fired temperature and the velocity outlet of hot air of 17.78%, 537.77oC and 4.862 m/s, respectively. Then, the circle stove have 24.59%, 758.32oC and 3.1424 m/s, respectively. it can be calculated the thermal efficiency reduce of the boiling salt production is 27.69%. Comparison between the rectangular and the circle salt boiling stove found that the circle stove have the thermal efficiency and heating flue more than the rectangular stove. It can reduce the cost of production and reduce the fuel consumption in the salt boiling process.

Modeling Leakage in a Fuel Transfer Pipeline Using Computational Fluid Dynamics Techniques

2005 ◽  
Author(s):  
Chris Alexander ◽  
Harbi Pordal
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Cfd Modeling ◽  
Soil Conditions ◽  
Insurance Company ◽  
Soil Permeability ◽  
Short Period ◽  
Computational Fluid Dynamics Cfd ◽  
Sufficient Magnitude ◽  
Time Required

Stress Engineering Services, Inc. (SES) performed an assessment of leaks for an insurance company that occurred in a fuel transfer pipeline at a tank storage facility. Of specific interest were the duration and timing of the leaks, which occurred from a 30 foot section that entered an earthen containment berm. It was originally estimated that 28,900 gallons of gasoline and ethanol leaked periodically from two (2) pin holes in the pipeline during a two month period. Early analysis efforts were not able to estimate the conditions that were necessary to cause the leaking fluid to break through the surface of the earthen berm (a phenomenon known as daylighting). Consequently, SES performed a more rigorous investigation to determine what conditions were required to produce daylighting, the significance of which involved quantifying the estimates of leak duration and the petroleum volumes. This effort integrated assumptions and data from prior analyses to assess the effects of time-dependency using computational fluid dynamics (CFD) modeling techniques. The intent was to take the existing calculations and provide a more technically-defensible model to predict the timing and volume released using reasonable conditions. SES used soil permeability and actual pipe pressure data to simulate the pipeline leak and soil conditions. The results of the CFD analysis showed that it is possible for daylighting to occur within a two-month period. However, a specific combination of conditions associated with leak rates, leak duration, and soil permeability are required to generate daylighting in a relatively short period of time. The predominant observation is that there must be extended periods of continuous leaking involving leak rates of sufficient magnitude. The significance of this work is that it presents a proven analytical method for modeling leaks in pipelines and addressing the effects of specific variables on the amount of released products and the time required to achieve specific leak volumes.

Integrated Live and Stored Internet Based Digital Microscopy for Education

2000 ◽  
Vol 6 (S2) ◽  
pp. 1168-1169
Author(s):  
Jack A. Zeineh
Keyword(s):  
Educational Institution ◽  
Video Camera ◽  
Educational Institutions ◽  
The Internet ◽  
Digital Microscopy ◽  
Video Cameras ◽  
Different Types ◽  
Software And Hardware ◽  
The Cost ◽  
Selection Of

Few educational institutions have well maintained microscopes that facilitate the experience intended by the creators of their teaching texts. The cost of putting a high quality selection of the different types of microscopes at every educational institution for access by all students is prohibitive. The advent of the Internet and the rapid proliferation of computers at educational institutions offer the prospect for dramatic improvements in microscopy education.We present an Internet based digital microscopy system with unique features for education. We have developed a unified architecture for management and transmission of live and stored microscope data over the Internet. The system consists of a combination of software and hardware. The hardware includes a microscope with a motorized stage, focus, and optionally a motorized nosepiece. Standard off the shelf components for each of the items can be used so that the user is afforded great flexibility in utilizing available hardware. Image acquisition is done by attaching a video camera to the microscope. Both analog and digital video cameras are supported, although it should be noted that users have experienced outstanding results with relatively inexpensive analog cameras.

A hitchhiker’s guide to microscopy and microanalysis using telecommunications, e-mail, and the Internet

1994 ◽  
Vol 52 ◽  
pp. 390-391 ◽  
Author(s):  
Nestor J. Zaluzec
Keyword(s):  
The Internet ◽  
Information Superhighway ◽  
The World ◽  
Exchange Information ◽  
On Line ◽  
Computer Based ◽  
Software And Hardware ◽  
Communication Software ◽  
Basic Ideas ◽  
E Mail

The Information SuperHighway, Email, The Internet, FTP, BBS, Modems, : all buzz words which are becoming more and more routine in our daily life. Confusing terminology? Hopefully it won't be in a few minutes, all you need is to have a handle on a few basic concepts and terms and you will be on-line with the rest of the "telecommunication experts". These terms all refer to some type or aspect of tools associated with a range of computer-based communication software and hardware. They are in fact far less complex than the instruments we use on a day to day basis as microscopist's and microanalyst's. The key is for each of us to know what each is and how to make use of the wealth of information which they can make available to us for the asking. Basically all of these items relate to mechanisms and protocols by which we as scientists can easily exchange information rapidly and efficiently to colleagues in the office down the hall, or half-way around the world using computers and various communications media. The purpose of this tutorial/paper is to outline and demonstrate the basic ideas of some of the major information systems available to all of us today. For the sake of simplicity we will break this presentation down into two distinct (but as we shall see later connected) areas: telecommunications over conventional phone lines, and telecommunications by computer networks. Live tutorial/demonstrations of both procedures will be presented in the Computer Workshop/Software Exchange during the course of the meeting.

Use of cold tolerant eucalyptus species as a partial replacement for southern mixed hardwoods

TAPPI Journal ◽  
2012 ◽  
Vol 11 (7) ◽  
pp. 29-35 ◽  
Author(s):  
PETER W. HART ◽  
DALE E. NUTTER
Keyword(s):  
Potential Method ◽  
The United States ◽  
Partial Replacement ◽  
Growth Time ◽  
Eucalyptus Species ◽  
Cold Tolerant ◽  
Hardwood Pulp ◽  
Time Required ◽  
The Cost ◽  
Operational Data

During the last several years, the increasing cost and decreasing availability of mixed southern hardwoods have resulted in financial and production difficulties for southern U.S. mills that use a significant percentage of hardwood kraft pulp. Traditionally, in the United States, hardwoods are not plantation grown because of the growth time required to produce a quality tree suitable for pulping. One potential method of mitigating the cost and supply issues associated with the use of native hardwoods is to grow eucalyptus in plantations for the sole purpose of producing hardwood pulp. However, most of the eucalyptus species used in pulping elsewhere in the world are not capable of surviving in the southern U.S. climate. This study examines the potential of seven different cold-tolerant eucalyptus species to be used as replacements for, or supplements to, mixed southern hardwoods. The laboratory pulping and bleaching aspects of these seven species are discussed, along with pertinent mill operational data. Selected mill trial data also are reviewed.

ANALISA PERBANDINGAN DALAM RANGKA PEMILIHAN BEBERAPA IP UPSTREAM PROVIDER DI PT. INDOSAT

2018 ◽  
Vol 4 (1) ◽  
pp. 57
Author(s):  
Yuli Anwar ◽  
Dahlar .
Keyword(s):  
Business Strategy ◽  
High Speed ◽  
Human Life ◽  
Sustainable Growth ◽  
The Internet ◽  
Network Service Provider ◽  
High Speed Data ◽  
Telecommunications Services ◽  
The Cost ◽  
Internet Network

Abstract. One of the advances in information technology that now has changed the outlook and human life, business process and business strategy of an institution is the internet. The internet is a very large networks that connected to computers and serves throughout the world in one centralized network. With the internet we can access data and information anytime and anywhere.    As one provider of high-speed data communications services and the pioneer of the internet network service provider in Indonesia that provides integrated services, as well as one of the pioneer development of internet services that provide extensive services in the building and apply it throughout Indonesia. Indosat ready to seize opportunities for sustainable growth of business spectrum are still sprawling Indonesia.    Therefore, Indosat continues to focus on the development of increased efforts to provide the best service for customers of Indosat. Indosat will continue to develop and expand network coverage and a larger investment that the company will achieve excellence in the field of integrated telecommunications services.    Ranking by region of the IP Providers can be seen by grouping IP Providers, and management over IP Providers prefer to choose providers based on where it orginates as an example for the region of the U.S if it will be preferred providers that come from U.S. providers.With the commencement of the internet network optimization start early in 2008 with the selection of the appropriate IP Upstream Provider criteria, it is up to date according to data obtained from Indosat, seen any significant changes to the cost of purchasing capacity of the IP Upstream.    Based on the data obtained that until Q3 or September 2008, the number of IP Upstream Providers that previously there were 20 to 10 IP Upstream Provider, IP Transit Price total decrease of 11% to the price of IP Transit Price / Mbps there is a decrease of 78%, while from the capacity bandwith an increase of 301% capacity from 2008.

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