A5015839352- Wind and Air Flow Studies
- Air Quality and Health Impacts
- Fluid Dynamics and Turbulent Flows
- Meteorological Phenomena and Simulations
- Aerodynamics and Fluid Dynamics Research
- Aeolian processes and effects
- Atmospheric chemistry and aerosols
- Fire dynamics and safety research
- Atmospheric and Environmental Gas Dynamics
- Urban Heat Island Mitigation
- Vehicle emissions and performance
- Plant Water Relations and Carbon Dynamics
- Building Energy and Comfort Optimization
- Atmospheric aerosols and clouds
- Fluid Dynamics and Vibration Analysis
- Noise Effects and Management
- Aerodynamics and Acoustics in Jet Flows
- Combustion and flame dynamics
- Spectroscopy and Laser Applications
- Heat Transfer Mechanisms
- Probabilistic and Robust Engineering Design
- Risk and Safety Analysis
- Soil Geostatistics and Mapping
- Underground infrastructure and sustainability
- Hydrology and Sediment Transport Processes
Czech Academy of Sciences, Institute of Thermomechanics
2013-2024
Czech Academy of Sciences
1977-2021
Centre National de la Recherche Scientifique
2009
Czech Academy of Sciences, J. Heyrovský Institute of Physical Chemistry
2009
VSB - Technical University of Ostrava
2009
Université de Lille
2009
Czech Technical University in Prague
2007
Slade Hospital
2004-2006
Czech Academy of Sciences, Institute of Atmospheric Physics
1975
The objective of this study is to determine processes pollution ventilation in the X-shaped street intersection an idealized symmetric urban area for changing approach flow direction. A unique experimental setup simultaneous wind tunnel measurement velocity and tracer gas concentration a high temporal resolution assembled. Advective horizontal vertical scalar fluxes are computed from averaged measured data within intersection. Vertical advective turbulent synchronized signals plane above All...
Projects focusing on spatio-temporal modelling of the living environment need to manage a wide range terrain measurements, existing spatial data, time series, results analysis and inputs/outputs from numerical simulations. Thus, GISs are often used data remote sensors, provide advanced integrate models. In order demonstrate integration series methods in framework GIS, we present case study focused dust transport over surface coal mining area, exploring 3D laser scanners, GPS aerial images,...
The advanced statistical techniques for qualitative and quantitative validation of Large Eddy Simulation (LES) turbulent flow within above a two-dimensional street canyon are presented. Time-resolved data from 3D LES compared with those obtained time-resolved 2D Particle Image Velocimetry (PIV) measurements. We have extended standard approach based solely on time-mean statistics by novel analyses the intermittent dynamics. While Hit rate metric indicates not so good agreement between values...
Naturally ventilated livestock buildings (NVLB) represent one of the most significant sources ammonia emissions. However, even dispersion passive gas in an NVLB is still not well understood. In this paper, we present a detailed investigation pollutant model cattle barn using wind tunnel experiment method. We simulated pollution by ground-level planar source. used time-resolved particle image velocimetry (TR-PIV) and fast flame ionisation detector (FFID) to study flow processes at high...
Laser photoacoustic spectrometry and a line permeation pollution source were used in study of the dispersion an urban agglomerate using simulation wind tunnel. Applications this measuring technique utilize high sensitivity broad dynamic range (3 orders magnitude case) detection method. The minimum detected absorbance method employed work was at level ≅ 4.3 × 10–6 (≅ 8 µg m–3 CH3OH). effectiveness flexibility for generation various concentrations gases verified emission sources developed...
The distribution of pollutants in two urban scale models (point emission source and street canyon with extensive transport) was investigated by means CO 2 laser photoacoustic spectroscopy the region atmospheric window (9–10 μm). experimental results physical modeling are a good agreement numerical calculations performed frame computational fluid dynamic (CFD) modeling. Methanol, ethanol, ozone (examples light pollutants), as well sulfur hexafluoride 1,2 dichlorethane heavy were selected on...
Detection of highly energetic structure in the turbulent flow can be easily done by wavelet analysis, especially with Morlet function as a mother for detection repetitious low-frequency structures and Mexican hat vortices. Since analysis simply applied on one-point measurement, better understanding its meaning is welcome. In this project, boundary layer was investigated focus intermittent dynamics. PIV snapshot were used comparison Wavelet results, since performed high sample frequency (500...
Previous wind-tunnel studies were focused mainly on lonely standing windbreaks or wind fences with respect to their velocity reduction efficiency and effective shelter distance. In presented study, we investigated the effects of a three different fence porosities (0.5, 0.25 0) embodied in shelter-like building for coal convey by means two-component Laser Doppler Anemometry (LDA). The turbulent flow characteristics behind compared those performed without fence. For characterization...