Application of CFD fluent program to calculations of turbulence characteristics in downstream of weir

The paper describes a comparison measured results and calculated velocity and turbulence intensity in downstream of weir. Investigations were conducted on model of the tired construction with outflow over gate, stilling pool and horizontal protection behind apron. Measure section were located on axial plane of channel. Measurements of velocity were executed on flat, horizontal bed and eroded bed. To measurements was used PEMS probe of registering temporary horizontal component value of vector of velocity. Results of measured characteristics of turbulence was compared from calculated by CFD Fluent program. To calculation model k-ε standard was used. Results obtained using these models were examined. In general, flowfields, velocities and turbulence predicted by FLUENT showed close agreement with relevant experimental results. ...

Terrestrial laser scanning as a tool to support monitoring hydrotechnical objects with regard to water dam in Rożnów

Monitoring and diagnostics of hydrotechnical objects provide knowledge about technical condition of the object. The main purpose of the evaluation process is to determine the technical condition at a certain time of use, by defining its stability and security. Technical diagnosis , defined as a set of methods and means to assess the causes, evolution and consequences of given set of technical facility, is a technical system. In the case of dams, monitoring and diagnostics based on active systems, deliberately designed , generating and processing information that are the basis for the assessment of their technical condition . In this article we present the opportunity to enrich the technical monitoring system of water dams by the technology of terrestrial laser scanning (TLS) . Terrestrial laser scanning is a device metrology , which in a non-contact measures the object and saves it in the form of an oriented point cloud . The analysis of the technical system, supported by TLS technology was conducted with regard to water dam in Rożnów. ...