Parallelization of an Urban Microscale Flow Model (urbanstream)

Transcription

1 Defence Research and Development Canada Recherche et développement pour la défense Canada Parallelization of an Urban Microscale Flow Model (urbanstream) Component 1 of CRTI Project RD Fue-Sang Lien and Kun-Jung Hsieh Waterloo CFD Engineering Consulting, Inc. Contract Scientific Authority: E. Yee, DRDC Suffield The scientific or technical validity of this Contract Report is entirely the responsibility of the contractor and the contents do not necessarily have the approval or endorsement of Defence R&D Canada. Defence R&D Canada Contract Report DRDC Suffield CR December 2007

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3 Parallelization of an Urban Microscale Flow Model (urbanstream) Component 1 of CRTI Project RD Fue-Sang Lien and Kun-Jung Hsieh Waterloo CFD Engineering Consulting, Inc. 200 University Avenue West Waterloo ON N2L 3G1 Contract Number: W R966 Contract Scientific Authority: E. Yee ( ) The scientific or technical validity of this Contract Report is entirely the responsibility of the contractor and the contents do not necessarily have the approval or endorsement of Defence R&D Canada. Defence R&D Canada Suffield Contract Report DRDC Suffield CR December 2007

4 Her Majesty the Queen as represented by the Minister of National Defence, 2007 Sa majesté la reine, représentée par le ministre de la Défense nationale, 2007

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37 UNCLASSIFIED SECURITY CLASSIFICATION OF FORM (highest classification of Title, Abstract, Keywords) DOCUMENT CONTROL DATA (Security classification of title, body of abstract and indexing annotation must be entered when the overall document is classified) 1. ORIGINATOR (the name and address of the organization preparing the document. Organizations for who the document was prepared, e.g. Establishment sponsoring a contractor's report, or tasking agency, are entered in Section 8.) Waterloo CFD Engineering Consulting, Inc. 200 University Avenue West Waterloo, ON N2L 3G1 2. SECURITY CLASSIFICATION (overall security classification of the document, including special warning terms if applicable) Unclassified 3. TITLE (the complete document title as indicated on the title page. Its classification should be indicated by the appropriate abbreviation (S, C or U) in parentheses after the title). Parallelization of an Urban Microscale Flow Model (urbanstream): Component 1 of CRTI Project RD 4. AUTHORS (Last name, first name, middle initial. If military, show rank, e.g. Doe, Maj. John E.) Lien, F.-S. and Hsieh, K.-J. 5. DATE OF PUBLICATION (month and year of publication of document) December a. NO. OF PAGES (total containing information, include Annexes, Appendices, etc) 31 6b. NO. OF REFS (total cited in document) DESCRIPTIVE NOTES (the category of the document, e.g. technical report, technical note or memorandum. If appropriate, enter the type of report, e.g. interim, progress, summary, annual or final. Give the inclusive dates when a specific reporting period is covered.) Final contract report 8. SPONSORING ACTIVITY (the name of the department project office or laboratory sponsoring the research and development. Include the address.) Defence R&D Canada Suffield, PO Box 4000, Station Main, Medicine Hat, AB T1A 8K6 9a. PROJECT OR GRANT NO. (If appropriate, the applicable research and development project or grant number under which the document was written. Please specify whether project or grant.) CRTI RD 10a. ORIGINATOR'S DOCUMENT NUMBER (the official document number by which the document is identified by the originating activity. This number must be unique to this document.) DRDC Suffield CR b. CONTRACT NO. (If appropriate, the applicable number under which the document was written.) W R966 10b. OTHER DOCUMENT NOs. (Any other numbers which may be assigned this document either by the originator or by the sponsor.) WatCFD Report WD001/ DOCUMENT AVAILABILITY (any limitations on further dissemination of the document, other than those imposed by security classification) ( x ) Unlimited distribution ( ) Distribution limited to defence departments and defence contractors; further distribution only as approved ( ) Distribution limited to defence departments and Canadian defence contractors; further distribution only as approved ( ) Distribution limited to government departments and agencies; further distribution only as approved ( ) Distribution limited to defence departments; further distribution only as approved ( ) Other (please specify): 12. DOCUMENT ANNOUNCEMENT (any limitation to the bibliographic announcement of this document. This will normally corresponded to the Document Availability (11). However, where further distribution (beyond the audience specified in 11) is possible, a wider announcement audience may be selected). No limitation on document announcement UNCLASSIFIED SECURITY CLASSIFICATION OF FORM

38 UNCLASSIFIED SECURITY CLASSIFICATION OF FORM 13. ABSTRACT (a brief and factual summary of the document. It may also appear elsewhere in the body of the document itself. It is highly desirable that the abstract of classified documents be unclassified. Each paragraph of the abstract shall begin with an indication of the security classification of the information in the paragraph (unless the document itself is unclassified) represented as (S), (C) or (U). It is not necessary to include here abstracts in both official languages unless the text is bilingual). The provision of an efficient and accurate Computational Fluid Dynamics (CFD) solver for simulating flows within an urban complex on the microscale (with characteristic length scale extending to about 1-2 km) is required to support the development of an advanced atmospheric transport and diffusion multiscale modeling system for hazard assessment of chemical, biological, radiological or nuclear (CBRN) agents released within cities. The ultimate goal of this supporting effort is to construct a virtual test facility (VTF) that could eventually be used to develop guidelines and procedures for operating in the urban complex after a CBRN incident. Details of the numerical algorithms used for the "stand-alone" microscale CFD solver urbanstream executing on serial computers have been described in the report entitled "Technical Description of Urban Microscale Modeling System: Component 1 of CRTI Project RD" by E. Yee, F.-S. Lien and H. Ji (DRDC Suffield TR ). The objectives of this report are twofold. The first objective is to provide a description of the coupling of urbanstream with an "urbanized" meso-gamma scale flow model (Global Environmental Multi-scale Local Area Model, or GEM LAM, developed by Canadian Meteorological Centre). A ''one-way interaction" scheme is adopted, which allows for the matching of velocity and turbulence field in any overlap region in a physically and mathematically consistent manner that preserves the physical conservation laws, mutually satisfies mathematical boundary conditions, and preserves numerical accuracy. The second objective is to provide implementation details about how urbanstream is parallelized for use on PC clusters and the IBM massively parallel supercomputing platform to give a problem-solving environment for full 3-D parallel simulation. Validation of this fully-coupled mesoscale-to-microscale system is achieved by detailed comparison of model predictions with comprehensive, high-quality full-scale urban measurements in a real cityscape the Joint Urban 2003 (JU2003) conducted in Oklahoma City in the US. 14. KEYWORDS, DESCRIPTORS or IDENTIFIERS (technically meaningful terms or short phrases that characterize a document and could be helpful in cataloguing the document. They should be selected so that no security classification is required. Identifies, such as equipment model designation, trade name, military project code name, geographic location may also be included. If possible keywords should be selected from a published thesaurus, e.g. Thesaurus of Engineering and Scientific Terms (TEST) and that thesaurusidentified. If it is not possible to select indexing terms which are Unclassified, the classification of each should be indicated as with the title.) Computational Fluid Dynamics MPI parallelization Urban Flow simulation UNCLASSIFIED SECURITY CLASSIFICATION OF FORM

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40 Defence R&D Canada Canada's Leader in Defence and National Security Science and Technology R & D pour la défense Canada Chef de file au Canada en matière de science et de technologie pour la défense et la sécurité nationale