National Repository of Grey Literature 10 records found  Search took 0.01 seconds. 
Information System Assessment and Proposal of ICT Modification
Sládek, Adam ; Moudrá, Libuše (referee) ; Novák, Lukáš (advisor)
The main idea of this bachelor thesis is to analyse information system of VZP, which contains all information about their clients. Access to this system is provided through company Elso Service s.r.o., which manages it for VZP. There is a teoretical and also practial part. The teoretical part describes and explains the main terms from information system theory. The practical part analyse the present quality of the system and suggests possible solutions for better funcionality of the system.
Information System Assessment and Proposal of ICT Modification
Sládek, Adam ; Moudrá, Libuše (referee) ; Novák, Lukáš (advisor)
The main idea of this bachelor thesis is to analyse information system of VZP, which contains all information about their clients. Access to this system is provided through company Elso Service s.r.o., which manages it for VZP. There is a teoretical and also practial part. The teoretical part describes and explains the main terms from information system theory. The practical part analyse the present quality of the system and suggests possible solutions for better funcionality of the system.
Modelling of flow over two transversal ribs in a channel with free surface
Sládek, A. ; Příhoda, Jaromír ; Stanislav, Jiří
Numerical simulation of turbulent flow over two transversal ribs on the bottom of a channel with free surface was carried out. The VOF (Volume-of-Fluid) method implemented in the commercial software FLUENT 6.3 was used for the solution of supercritical flow in a channel with free surface. The two-equation turbulence model according to Shih et al. was applied. The simulation was realised for ribs with the relative spacing t/b = 6; 10 and 20. Profiles of mean velocity and velocity fluctuation obtained by numerical simulation were compared with experimental data from LDA and PIV measurements. The behaviour of free surface over ribs was compared with experiments as well.
Modelling of flow over one transversal rib in a channel with free surface
Sládek, Aleš ; Příhoda, Jaromír
Numerical simulation of flow over one transversal rib on the bottom of a channel with free surface was carried out. The VOF (Volume-of-Fluid) method implemented in the commercial software FLUENT 6.3 was used for the solution of supercritical flow in a channel with free surface. The two-equation turbulence model according to Shih et al. was applied. Profiles of mean velocity and velocity fluctuation obtained by numerical simulation were compared with experimental data from PIV measurements. Secondary flow and the length of separated region behind the rib were compared with experimental data as well.
Numerická simulace proudění ve 2D kanále s drsnými stěnami
Stanislav, J. ; Sládek, Aleš ; Příhoda, Jaromír
Numerical simulation of the 2D channel flow with rough walls was carried out by means of the commercial code FLUENT 6.1. Results were compared with experimental data for rough wall modelled by abrasive paper with grit of 60. The effect of the computational grid on velocity profiles near the wall and on the friction coefficient was tested.
Modelling of rough-wall flow in a straight channel
Stanislav, J. ; Šafařík, P. ; Příhoda, Jaromír ; Sládek, Aleš
The contribution deals with numerical solution of three-dimensional incompressible flow in the straight channel with rough walls using the commercial code FLUENT 6.1. The effect of the computational grid is investigated using k-epsilon turbulence model modified for the rough wall. Used versions of grids are analysed in detail and results are compared with experimental data.
Optimizatiom of curved diffuser with inner cylindrical wall
Sládek, A. ; Hyhlík, T. ; Příhoda, Jaromír
The aim of the paper is optimization of curved diffusers with rectangular cross-section. The optimization is based on numerical solution of Navier-Stokes equations with standard k-eps turbulence model using FLUENT 6.0 software. The inner wall is cylindrical and the outer wall is described by the Bezier spline curve with two parameters. Energy losses coefficient is very dependent on the radius of the inner wall. The minimum of energy losses was achieved for the ratio Ri/d= 2,25.
Design of experimental test rig for the research of the flow in curved diffusers
Sládek, Aleš ; Jonáš, Pavel
The design and construction are described of an experimental rig for the invesstigation of channell-flow and flow in curved diffusers.
Effect of the inner cylindrical wall radius on the flow through a curved diffusser with rectangular cross-section
Příhoda, Jaromír ; Sládek, A. ; Sedlář, M. ; Hyhlík, T.
The paper deals with the numerical simulation of turbulent flow in curved diffusers with rectangular cross-section. Results obtained by CFX and FLUENT software are compared with experiments in a water channel. The effect of the inner cylindrical wall radius on the extent of separation, secondary flow, and on energy losses was investigated for diffusers with 90 deg bend and area ratio AR=1.5.
Numerické řešení proudění v zakřivených difuzorech s kruhovou vnitřní stěnou
Sládek, A. ; Hyhlík, T. ; Příhoda, Jaromír
The optimisation of the rectangular cross-section diffuser with 90 deg bend was carried out using the FLUENT 6.0 software. The aim was to minimize energy losses in the curved diffuser with three parameters: radius of the inner cylindrical wall, and two parameters describing the distribution of the channel width.

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