National Repository of Grey Literature 102 records found  beginprevious93 - 102  jump to record: Search took 0.01 seconds. 
Proudění uvnitř idealizované městské zástavbě
Bezpalcová, Klára ; Harms, F. ; Leitl, B. ; Jaňour, Zbyněk
The regular obstacle array of the Mock Urban Setting Test (MUST) fiedl site in the Utah West Desert (USA) has been replicated in the large boundary layer wind tunnel at University of Hamburg. The trials run during the field campaign were repeated in the wind tunnel as well as additional measurements of flow.The strong flow inhomogeneities were observed on the vertical profiles of shear stress as well as on the horizontal mean flow for different array orientation.
Urban atmospheric boundary layer- physical modelling
Bezpalcová, Klára ; Kellnerová, Radka ; Šeděnková, Hana ; Van Hersrcke, S. ; Střižík, M. ; Jaňour, Zbyněk
Small scale dispersion from line source in the Urban Atmospheric Boundary Layer. Two main types of tasks are investigated: simplified generalized situation and direct solution of geometric complex situations.
Simulace proudění a disperze nad městskou zástavbou v aerodynamickém tunelu
Jaňour, Zbyněk ; Bezpalcová, Klára ; Šeděnková, Hana
The wind-tunnel simulations have been conducted The followingprocesses inside the inertial layer of the Urban Atmospheric Boundary Layer (UABL) were undertaken:street-scale flow and dispersion from line source, small-scale flow dispersion from point source and microscale dispersion from line source through roughness sublayer.
The Flow Fiel in the Entrance Part of a Winf Tunnel
Hofer, Tomáš ; Šafařík, Pavel ; Luxa, Martin
The aim of this work was to apply the numerical simulation of the flow into the design process of the nozzle in order to verify the quality of the design. The numerical simulation was carried out using the Fluent 6.1 solver. The mesh was prepared using the pre-processor Gambit 2.0.
Flow in the entrance part of the wind tunnel
Hofer, T. ; Šafařík, P. ; Hyhlík, T. ; Luxa, Martin
paper deals with numerical solution of flow in the entrance part of the wind tunnel. Program FLUENT 6.0 was used for solution of flow of incompressible viscous fluid in axisymmetric channel.
Physical modellling of air pollutant distribution by laser photoacoustic spectrometry in a wind tunnel
Civiš, S. ; Zelinger, Z. ; Jaňour, Zbyněk
In this work we used the laser photoacoustic detectiopn as an analytical tool for monitoring methanol concentration in a wind tunnel. Methanol was chosen as a tracer substance simulating the pollutants. A simple model of a street canyon together with permeation source of methanol vapour was used in various measurements of cross-section profiles. The distribution an concentration of simulated air pollutions has been studied in the street canyon model as a function of the wind velocity.
Problém velikosti ulice
Bezpalcová, Klára ; Jaňour, Zbyněk
Two main types of tasks are investigated: Simplified, generalised situations and direct solution of geometric complex situations. The methods of the urban type inflow simulation, small scale flow simulation and dispersion simulation including a line source model modelling had to be developed in both cases witin wind tunnel modelling.
Numerická simulace trojrozměrného proudění ve vstupní části aerodynamického tunelu
Hofer, Tomáš ; Šafařík, Pavel ; Luxa, Martin
The paper deals with numerical solutions of 3D viscous steady flows of incompressible fluid in the entrance nozzle. The turbulent secondary flow in corners is observed. Conventional nozzle and optimized nozzle were compared.

National Repository of Grey Literature : 102 records found   beginprevious93 - 102  jump to record:
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