scaling Articles
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Digital twin in Hagerbach Test Gallery – Tunnel Digitalization Center automated with Siemens technology
A unique test laboratory has been opened at the Hagerbach Test Gallery in Flums. The Tunnel Digitalization Center (TDC) enables the simulation of tunnel applications in a realistic environment. In the past, solutions for tunneling had to be installed and tested on site at great expense. The TDC is equipped with numerous Siemens solutions. For example, engineers have implemented the TIA Portal ...
By Siemens AG
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Local mass transfer coefficients over idealised two–dimensional urban street canyons
In view of the large number of urban inhabitants, ventilation and pollutant transport in urban areas are major research problems for several decades. This paper focuses on the studies of the correlation between the ventilation and pollutant removal over idealised two–dimensional urban street canyons using wind tunnel experiments in the Department of Mechanical Engineering, The University of Hong ...
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Modelling concentration fluctuations for operational purposes
We investigated the two first moments of the concentration distribution from a point source release thanks to wind tunnel measurements. The results were analysed with the statistical model from Yee et al. (1994). This model requires two parameters related to the larger scale velocity fluctuations and to the concentration variability due to smaller scale fluctuations respectively. A robust ...
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TAIM WESER presents at the CERN LHC
CERN, European Center for Nuclear Investigation, it is one of the biggest and more respected scientific investigation centres all over the world. Its business is the fundamental physics in order to discover of what is made and how functions the Universe. At CERN, complex scientific instruments are used in order to study the basic components of the matter- the fundamental particles-. When these ...
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Dispersion modelling near tunnel exits: simulation and measurements
Measurements of car exhaust gases were made in May/June 1995 in the vicinity of the Bielefeld tunnel. CO and NOx from car exhausts were measured to allow comparison with a model simulation. Ozone was also measured. These measurements were made using commercial continuous analysers. A valve control system was used to investigate the dispersion of the trace gases. This allowed measurements at ...
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Gaseous pollutant dispersion around urban-canopy elements: wind tunnel case studies
There is an evident lack of reliable and detailed in situ measurement data for verifying numerical predictions of atmospheric dispersion in the urban environment on sub-meso scales. Wind-tunnel studies of dispersion around typical elements of the urban canopy (isolated buildings, groups of buildings, street canyons) could provide valuable substitutes for field datasets. They can achieve a high ...
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Ground Penetrating Radar Evaluation of Concrete Tunnel Linings
Abstract - Ground penetrating radar was used to map tunnel lining condition and locate concrete deterioration and voids in a continuous and non destructive manner. GPR surveying of Kapoor Water Supply Tunnel, Victoria, Canada was carried out with a 1000 MHz Sensors and Software Ltd., Conquest system mounted on a custom built cart. This 8.8 km long 2.3 m diameter concrete lined circular tunnel was ...
By SewerVUE
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Comparison between different dispersion models using wind-tunnel small-scale measurements
In this paper, the results from a plume diffusion experiment on a small-scale model of a two-stack waste incinerator, carried out in a developed boundary-layer wind-tunnel, will be presented. A brief description of the tunnel, the measurement system, and the artificially developed neutral boundary layer is given. The experiments investigate ground-level concentration measurements and vertical and ...
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