ARCHITECTURE AND URBAN DEVELOPMENT. RESTRUCTURING AND RESTORATION

ROLE OF SOLAR RADIATION IN FORMATION OF THERMAL AND WIND CONDITIONS OF THE INTER-BUILDING SPACE

Vestnik MGSU 3/2012
  • Giyasov Botir Iminzhonovich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Associate Professor, chair, Department of Architectural and Construction Design, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (495) 287-49-14; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 12 - 15

Upon the completion of the analysis of thermal physic processes undergoing within the inter-building space and upon the identification of the mechanism of the convective motion undergoing in close proximity to the surfaces of buildings, substantial impact of solar radiation on thermal and wind conditions within inter-building spaces is identified. The impact intensity is driven by the exposure of surfaces to the sun and the intensity of heat transformation processes. Intensive influence of solar radiation produced on surfaces of buildings promotes convective streams that shape up the thermal and wind conditions within inter-building spaces.

DOI: 10.22227/1997-0935.2012.3.12 - 15

References
  1. Giyasov A. Issledovanie teplo-vetrovykh protsessov na modeli zhiloy zastroyki gorodov s zharko-shtilevym usloviem klimata [Research of Thermal and Wind Processes as Exemplified by Residential Housing Areas in Hot and Windless Climatic Conditions]. Izvestiya VUZov [News Bulletins of Universities], Stroitel’stvo i arkhitektura [Construction and Architecture], Novosibirsk, 1989, no. 6, pp. 43—47.
  2. Abdulloev M. Aerodinamicheskie kharakteristiki zhilykh zdaniy v usloviyakh slozhnogo rel’efa [Aerodynamic Characteristics of Residential Buildings in the Complex Terrain Relief Environment]. Author’s abstract of a dissertation for the title of the candidate of technical sciences. Moscow, 1984, p. 24.
  3. Giyasov B.I. Vliyanie zharko-shtilevogo klimata na ograzhdayushchie konstruktsii i mikro-klimat zhilykh zdaniy [Influence of the Hot Windless Climate on Shell Structures and the Microclimate of Residential Buildings]. Author’s abstract of a dissertation for the title of the candidate of technical sciences. Moscow, 2000, p. 24.
  4. Abramovich. G.N. Teoriya turbulentnykh struy [The theory of Turbulent Streams]. Moscow, Fizmatgiz, 1960, p. 375.
  5. Baum V.A., Babaev C. Issledovanie pogloshcheniya solnechnoy radiatsii razlichnymi materialami [Research of Absorption of Solar Radiation by Various Materials]. Geliotekhnika, 1966, no. 3, pp. 4—61.

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LAGRANGIAN APPROACH TO DESCRIPTION OF TWO-DIMENSIONAL BOUNDARY LAYER

Vestnik MGSU 5/2013
  • Otstavnov Evgeniy Igorevich - Moscow State University of Civil Engineering (MGSU) Candidate of Physical and Mathematical Sciences, Senior Lecturer, Department of Theoretical Mechanics and Aerodynamics; +7 (499) 183-24-01., Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 49-55

In the article, the two-dimensional boundary layer is considered on the basis of the Lagrangian approach to the continuous medium description using coordinates of particles. Classical L. Prandtl’s method of Navier-Stokes equation simplification through expansion of dependent variables in a series is applied to develop the model. Direct transformation of widely used Euler equations derived by L. Prandtl generates the same result. Boundary conditions are regarded as one-sided or non-holonomic restrictions from the viewpoint of analytical mechanics.The mass conservation equation can be detached from the main equation of motion. At the same time, one can conclude that a particle starting its motion from an internal part of the layer will remain there without reaching any boundary in a finite time. The perpendicular coordinate evolution can be calculated when one has a law of motion along the boundary employed using the standard approach to the certain PDE solution. The model presentation is based on the Hamiltonian apparatus of classical mechanics. Derivatives of spatial variables take the form of the Poisson brackets. Hence, the full equation for the Newton’s second law has acceleration and doubled application of Poisson brackets. The pressure gradient is a function of a single coordinate; therefore, it can be eliminated by another Poisson bracket application due to the symmetric property of the skew.

DOI: 10.22227/1997-0935.2013.5.49-55

References
  1. Tit’ens O. Gidro- i aeromekhanika [Fluid and Aeromechanics]. Moscow, ONTI Publ., 1935, vol. 2, 312 p.
  2. Loytsyanskiy L.G. Laminarnyy pogranichnyy sloy [Laminar Boundary Layer]. Moscow, Izd-vo fiziko-matematicheskoy literatury publ., 1962.
  3. Shlikhting G. Teoriya pogranichnogo sloya [Boundary Layer Theory]. Moscow, Nauka Publ., 1974.
  4. Abrashkin A.A., Yakubovich E.I. Vikhrevaya dinamika v lagranzhevom opisanii [Lagrangian Description of Vortex Dynamics]. Moscow, FIZMATLIT Publ., 2006.
  5. Liu G.R., Liu M.B. Smoothed Particle Hydrodynamics: a Mesh-free Particle Method. World Scientific Publishing Co., 2003.
  6. Lamb G. Gidrodinamika [Fluid Dynamics]. Moscow, OGIZ Publ., 1947.
  7. Berezinskaya S.N., Kugushev E.I. Ob uravneniyakh dvizheniya mekhanicheskikh sistem s uslovnymi odnostoronnimi svyazyami [On Motion Equations for Mechanical Systems Featuring Conventional One-way Connections]. Preprint of the Keldysh Institute of Applied Mathematics of the Russian Academy of Sciences. Moscow, 2002.
  8. Oleynik O.A. Matematicheskie zadachi teorii pogranichnogo sloya [Mathematical Problems of the Boundary Layer Theory]. Uspekhi matematicheskikh nauk [Advancements of Mathematical Sciences]. 1968, vol. 23, no. 3(141), pp. 3—65.

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ARCHITECTURAL-BUILDING AERODYNAMICS

Vestnik MGSU 6/2017 Volume 12
  • Poddaeva Olga Igorevna - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, associate professor, head of the Educational Scientific and Production Laboratory for Aerodynamic and Aeroacoustic Testing of Building Constructions, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Dunichkin Ilya Vladimirovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Associate Professor, Department of Urban planning, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 602-609

This article gives a brief historical digression about the formation of architectural and building aerodynamics as a separate branch of the construction science. The main methods and approaches to the solution of problems of architectural and building aerodynamics are listed; the classification of problems of aerodynamics of structural steel according to the studied objects is given; main peculiarities of the research in selected areas are briefly indicated. The aim of the work is to systematize existing approaches to assessing wind impact on structural steel taking into account some modern international requirements, as well as to choose the optimal method for solving this problem in relation to various structural steel. It is established that, currently, the study about wind impact is especially important for high-rise buildings, structures, and structural steel nonresistant to dynamic loads (long span bridge conduits, gins polarized, thin-shell tubes, etc.), as well as for residential estates with restrained urban conditions. It is necessary to carry-out these aerodynamic studies at the designing stage for the above objects because it is directly related to the issues of reliability and safety.

DOI: 10.22227/1997-0935.2017.6.602-609

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