61 resultados para Canopy height
Filtro por publicador
- Repository Napier (1)
- AMS Tesi di Dottorato - Alm@DL - Università di Bologna (2)
- Aquatic Commons (5)
- ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (2)
- Archimer: Archive de l'Institut francais de recherche pour l'exploitation de la mer (3)
- Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (1)
- Aston University Research Archive (2)
- Avian Conservation and Ecology - Eletronic Cientific Hournal - Écologie et conservation des oiseaux: (4)
- Biblioteca de Teses e Dissertações da USP (2)
- Biblioteca Digital | Sistema Integrado de Documentación | UNCuyo - UNCUYO. UNIVERSIDAD NACIONAL DE CUYO. (3)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (14)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (5)
- Biblioteca Digital de Teses e Dissertações Eletrônicas da UERJ (1)
- BORIS: Bern Open Repository and Information System - Berna - Suiça (28)
- Brock University, Canada (3)
- Bucknell University Digital Commons - Pensilvania - USA (1)
- Cambridge University Engineering Department Publications Database (13)
- CentAUR: Central Archive University of Reading - UK (61)
- Center for Jewish History Digital Collections (3)
- Chinese Academy of Sciences Institutional Repositories Grid Portal (23)
- Cochin University of Science & Technology (CUSAT), India (2)
- Coffee Science - Universidade Federal de Lavras (1)
- Dalarna University College Electronic Archive (3)
- Deakin Research Online - Australia (24)
- Digital Commons - Michigan Tech (5)
- Digital Commons at Florida International University (21)
- Digital Repository at Iowa State University (1)
- DigitalCommons - The University of Maine Research (1)
- DigitalCommons@The Texas Medical Center (3)
- DRUM (Digital Repository at the University of Maryland) (3)
- Duke University (3)
- eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (24)
- FAUBA DIGITAL: Repositorio institucional científico y académico de la Facultad de Agronomia de la Universidad de Buenos Aires (1)
- Greenwich Academic Literature Archive - UK (1)
- Harvard University (3)
- Helda - Digital Repository of University of Helsinki (7)
- Indian Institute of Science - Bangalore - Índia (22)
- Institutional Repository of Leibniz University Hannover (2)
- INSTITUTO DE PESQUISAS ENERGÉTICAS E NUCLEARES (IPEN) - Repositório Digital da Produção Técnico Científica - BibliotecaTerezine Arantes Ferra (3)
- Instituto Politécnico de Bragança (1)
- Lume - Repositório Digital da Universidade Federal do Rio Grande do Sul (1)
- National Center for Biotechnology Information - NCBI (3)
- Plymouth Marine Science Electronic Archive (PlyMSEA) (9)
- Publishing Network for Geoscientific & Environmental Data (91)
- QSpace: Queen's University - Canada (2)
- QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (18)
- Queensland University of Technology - ePrints Archive (288)
- Repositório Alice (Acesso Livre à Informação Científica da Embrapa / Repository Open Access to Scientific Information from Embrapa) (5)
- Repositório Científico da Universidade de Évora - Portugal (5)
- Repositório Digital da UNIVERSIDADE DA MADEIRA - Portugal (3)
- Repositório Institucional da Universidade de Brasília (1)
- Repositório Institucional da Universidade Tecnológica Federal do Paraná (RIUT) (1)
- Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (119)
- SAPIENTIA - Universidade do Algarve - Portugal (1)
- Universidad de Alicante (1)
- Universidad del Rosario, Colombia (1)
- Universidad Politécnica de Madrid (19)
- Universidade Complutense de Madrid (1)
- Universidade de Madeira (3)
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP) (1)
- Universidade Federal de Uberlândia (2)
- Universidade Federal do Pará (6)
- Universidade Federal do Rio Grande do Norte (UFRN) (2)
- Universidade Técnica de Lisboa (1)
- Universitätsbibliothek Kassel, Universität Kassel, Germany (3)
- Université de Lausanne, Switzerland (1)
- Université de Montréal, Canada (1)
- University of Connecticut - USA (4)
- University of Michigan (23)
- University of Queensland eSpace - Australia (33)
- University of Washington (1)
Resumo:
Simple first-order closure remains an attractive way of formulating equations for complex canopy flows when the aim is to find analytic or simple numerical solutions to illustrate fundamental physical processes. Nevertheless, the limitations of such closures must be understood if the resulting models are to illuminate rather than mislead. We propose five conditions that first-order closures must satisfy then test two widely used closures against them. The first is the eddy diffusivity based on a mixing length. We discuss the origins of this approach, its use in simple canopy flows and extensions to more complex flows. We find that it satisfies most of the conditions and, because the reasons for its failures are well understood, it is a reliable methodology. The second is the velocity-squared closure that relates shear stress to the square of mean velocity. Again we discuss the origins of this closure and show that it is based on incorrect physical principles and fails to satisfy any of the five conditions in complex canopy flows; consequently its use can lead to actively misleading conclusions.