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National Repository of Grey Literature 6 records found  Search took 0.00 seconds. 
Assessment of the Possibilities of Increase the Flood Protection
 Bartošová, Ludmila ; Smelík, Lukáš (referee) ; Uhmannová, Hana (advisor)
This thesis deals with the assessment capacity of channel and objects to the flow Ludvíkovický stream in the village Ludvíkovice. The processing was carried out of the focusing channel modeling in a computer program HEC-RAS. The next section was prepared by theoretical design measures to increase the capacity of the channel in critical points of the territory.
Detailed record
Metrological characteristics of current velocity meters using the electromagnetic principle of measurement
 Vítů, Martin ; Brázda, Martin (referee) ; Žoužela, Michal (advisor)
This master’s thesis deals with the assesment of directional sensivity and accuracy of current stream velocity using electromagnetic induction meters in circumstances simulating the real measurement profiles condictions. The theoretical part of the thesis describes the issue of streamflow measurement in open channels and determination of the relevant measurement uncertainties. It also includes description of the hydraulic circuit and the subject current velocity meters. The experimental part of the thesis focuses on the effect of turbulence on the value and accuracy of measured velocity and directional sensivity of electromagnetic induction meters of current velocity. The results are compared with parameters given by manufacturers, research by other authors and with the metrological characteristics of hydrometric propellers, which are commonly used for streamflow measurement in open channels.
Detailed record
Metrological characteristics of current velocity meters using the electromagnetic principle of measurement
 Vítů, Martin ; Brázda, Martin (referee) ; Žoužela, Michal (advisor)
This master’s thesis deals with the assesment of directional sensivity and accuracy of current stream velocity using electromagnetic induction meters in circumstances simulating the real measurement profiles condictions. The theoretical part of the thesis describes the issue of streamflow measurement in open channels and determination of the relevant measurement uncertainties. It also includes description of the hydraulic circuit and the subject current velocity meters. The experimental part of the thesis focuses on the effect of turbulence on the value and accuracy of measured velocity and directional sensivity of electromagnetic induction meters of current velocity. The results are compared with parameters given by manufacturers, research by other authors and with the metrological characteristics of hydrometric propellers, which are commonly used for streamflow measurement in open channels.
Detailed record
Controlled movement of a spherical particle in an open channel
 Chára, Zdeněk ; Kysela, Bohuš ; Konfršt, Jiří
The paper presents experimental results of the flow around the spherical particle, where the particles are placed on a thin rod and its movement is controlled by a step motor. To determine the velocity fields around the moving particle, the 2D PIV method was used. The measurement was carried out in the open channel, the bottom of which was covered with one layer of 6 mm diameter glass bars.
Detailed record
Assessment of the Possibilities of Increase the Flood Protection
 Bartošová, Ludmila ; Smelík, Lukáš (referee) ; Uhmannová, Hana (advisor)
This thesis deals with the assessment capacity of channel and objects to the flow Ludvíkovický stream in the village Ludvíkovice. The processing was carried out of the focusing channel modeling in a computer program HEC-RAS. The next section was prepared by theoretical design measures to increase the capacity of the channel in critical points of the territory.
Detailed record
3D mathematical model of spherical particle saltatory movement in open channel with rough bed
 Lukerchenko, Nikolay ; Chára, Zdeněk ; Vlasák, Pavel
One of the main modes of bed load transport is saltation when particles hop up from the bed and follow ballistic-like trajectories. Mathematical models of saltation are mostly two-dimensional although the particle motion is actually three-dimensional. The aim of the present study is development of the 3D mathematical model of solid particle saltatory motion over rouhg bed in an open channel.
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