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Saturday, August 1, 2020 | History

4 edition of A knowledge-based approach to automated flow-field zoning for computational fluid dynamics found in the catalog.

A knowledge-based approach to automated flow-field zoning for computational fluid dynamics

A knowledge-based approach to automated flow-field zoning for computational fluid dynamics

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Published by National Aeronautics and Space Administration, Ames Research Center, For sale by the National Technical Information Service in Moffett Field, Calif, [Springfield, Va .
Written in English


Edition Notes

Other titlesKnowledge based approach to automated flow-field zoning for computational fluid dynamics.
StatementAlison Andrews Vogel.
SeriesNASA technical memorandum -- 101072.
ContributionsAmes Research Center.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL17633867M
OCLC/WorldCa70107430

The experiences showed that the developed computational fluid dynamics technique gives a below 99% accuracy in the velocity and the temperature field, and approximately 85% accuracy in the volume flow values, resulting in a good prediction for aerodynamic characterization of buildings, i.e., passive ventilation air exchange rate. Since the devices involve fluid flow, and some of the problems are flow related, computational fluid dynamics (CFD) forms a large part of this numerical modelling and, as in many fields of engineer has become widespread in biomedical engineering in general (see, as examp 25, 26) and in particular has many uses in studying the.

A computational fluid dynamics model for investigating air flow patterns directive that the dust and methane concentration in underground coal mines should not exceed mg/m³ and % by volume, respectively. Ventilation is a popular technique that is used to control dust and methane gas in underground coal mines to allowable concentrations. #NO Equations for a ventilation design derived from computational fluid dynamics. Chow W K, Wong L T Switzerland, Indoor and Built Environment, No 7, , pp , 5 figs, 10 tabs, 23 refs. Computational fluid dynamics (CFD) was used in a study of the air flow characteristics in .

conventional approach simulates a large number of flow scenarios with different boundary conditions. This paper proposes a method that combines the genetic algorithm (GA) with computational fluid dynamics (CFD) technique, which can efficiently predict and optimize the flow inlet conditions with various objective functions. The current state of the art in computational aerodynamics for whole-body aircraft flowfield simulations is described. Recent advances in geometry modeling, surface and volume grid generation, and flow simulation algorithms have led to accurate flowfield predictions for increasingly complex and realistic configurations. As a result, computational aerodynamics has emerged as a crucial enabling.


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A knowledge-based approach to automated flow-field zoning for computational fluid dynamics Download PDF EPUB FB2

Flow-field zoning is becoming popular in computational fluid dynamics (CFD) as a means of alleviating the three-dimensional (3-D) grid-generation bottleneck caused by complex geometries, the need for selective grid refinement, and computer memory and speed limitations.

KNOWLEDGE-BASED FLOW FIELD ZONING Alison E. Andrews ('1 ABSTRACT Automation of flow field zoning in two dimensions is an important step towards easing the three-dimensional grid generation bottleneck in computational fluid dynam- ics.

A knowledge-based approach works well, but certain aspects of flow field zoning. Get this from a library. A knowledge-based approach to automated flow-field zoning for computational fluid dynamics.

[Alison Andrews Vogel; Ames Research Center.]. A knowledge based approach works well, but certain aspects of flow field zoning make the use of such an approach challenging. A knowledge based flow field zoner, called EZGrid, was implemented and tested on representative two-dimensional aerodynamic configurations.

Results are shown which illustrate the way in which EZGrid incorporates the effects of physics, shape description, position, and user bias Author: Alison E. Andrews. Abstract Automation of flow-field zoning in two-dimensions is an important step towards easing the three-dimensional grid generation bottleneck in computational fluid dynamics.

A knowledge-based approach works well, but several aspects of flow-field zoning make the use of such an approach by: 5. Full text of "NASA Technical Reports Server (NTRS) A knowledge-based approach to automated flow-field zoning for computational fluid dynamics" See other formats.

Automation of flow-field zoning in two-dimensions is an important step towards easing the three-dimensional grid generation bottleneck in computationa. A Knowledge-Based Approach to Automated Flow-Field Zoning for Computational Fluid Dynamics. TF M.L.

Merriam An Entropy-Based Approach to Nonlinear Stability. TF K. Shariff, J.H. Ferziger Dynamics of a Class of Vortex Rings. TF 12/88 W.W. Humphreys, W.C. Reynolds. A Knowledge-Based Approach to Automated Flow-Field Zoning for Computational Fluid Dynamics.

TF M.L. Merriam An Entropy-Based Approach to Nonlinear Stability. TF K. Shariff, J.H. Ferziger Dynamics of a Class of Vortex Rings. TF 12/88 W.W. Humphreys, W.C. Reynolds. Automation of flow-field zoning in two-dimensions is an important step towards easing the three-dimensional grid generation bottleneck in computational fluid dynamics.

Classification: fluid flow vs. granular flow • Fluid and solid particles: fluid flow vs. granular flow. • A fluid consists of a large number of individual molecules. These could in principle be modeled as interacting solid particles.

• The interaction between adjacent salt grains and adjacent fluid parcels is. Andrews AE () A knowledge-based approach to automate flow field zoning for computational fluid mechanics.

PhD dissertation, Department of Mechanical Engineering, Stanford. A knowledge-based reactive transport approach for the simulation of biogeochemical dynamics in Earth systems. Authors. (KB), which combines Information Technology (IT), an automatic code generator, and database management, facilitates the automated construction of complex reaction networks from comprehensive information stored at the level.

$8 0 1 2 3 0 1 2 3 κ∆x κ*∆x 2 Centralnd 4 Central. =!*7>.))# # -# #.: # = >!)# #)!). An illustration of an open book. Books. An illustration of two cells of a film strip.

Video. An illustration of an audio speaker. Audio An illustration of a " floppy disk. Full text of "Surface Modeling, Grid Generation, and Related Issues in Computational Fluid Dynamic (CFD) Solutions". Alison Andrews Vogel Automation of flow-field zoning in two-dimensions is an important step towards easing the three-dimensional grid generation bottleneck in computational fluid dynamics.

10th Computational Fluid Dynamics Conference Honolulu,HI,U.S.A. 24 June - 26 June 10th Computational Fluid Dynamics Conference American Institute of Aeronautics and Astronautics Reston, Virigina, ()., (). Automated differentiation for stiff sets of differential equations is one of the key features of our Automatic Code Generation (ACG) procedure [Regnier et al., ].

[15] The simultaneous implementation of a library of biogeochemical processes into a Knowledge Base (KB) is an additional crucial component of the proposed simulation environment.

Predictive Computational Fluid Dynamics Development and its Verification and Validation: An Overview In this approach, the flow field data obtained from validation experiments require a higher level of fidelity, resolution and documentation, including a complete and thorough description of the boundary and initial conditions driving the.

How To Get Started with Computational Fluid Dynamics Introduction to Grid and Mesh Generation for CFD How to Plan a CFD Analysis First Work Book of Examples Computational Fluid Dynamics is a very powerful engineering tool, enabling a wide variety of flow situations to be simulated, reducing the amount of testing required, increasing.

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.Computational Wind Engineering (CWE) is the application of computational methods to Wind Engineering problems.

While CWE is more than Computational Fluid Dynamics (CFD) alone, CFD has so far constituted the major part of CWE.Highly accurate computational fluid dynamics (CFD) calculations and high-resolution experimental observations have been used to clarify the characteristics of unsteady flows.

1,2 1. N. N. Ohno and A. Kageyama, “ Region-of-interest visualization by CAVE VR system with automatic control of level-of-detail,” Computer Physics Communications.