| |
| |
|
Modelling of flow over a backward-facing step in streams with various turbulence level
Příhoda, Jaromír ; Sedlář, M.
Turbulent flow over a backward-facing step in streams with a various turbulence level was numerically simulated using software ANSYS CFX-5. Numerical solution carried on with the two-equation SST model and/or with a k-omega based Reynolds stress model was compared with experimental data obtained for three different values of free-stream turbulence level. The predicted length of the recirculation region corresponds well with experimental data but the dependence of the ratio xr/h on free-stream turbulence level is smaller.
|
|
Numerické řešení sdílení tepla v proudu dopadajícím na stěnu
Kozel, K. ; Louda, Petr ; Příhoda, Jaromír
The paper deals with the numerical solution of 3D impinging turbulent jet cooling a weakly heated wall. The solution was carried out using the SST model and/or an explicit algebraic Reynolds stress model and completed by a generalized gradient-diffusion hypothesis for modelling of turbulent heat flux. While the EARSM model gives good results for the velocity field, all used models overestimate heat transfer in the impingement region.
|
|
Numerické modelování složitých turbulentních proudění
Kozel, K. ; Louda, Petr ; Příhoda, Jaromír
The work deals with the numerical solution of turbulent impinging jet and round jet in a cross flow. The mathematical model is based on averaged Navier-Stokes equations closed by a turbulence model. Turbulence models used are a low-Reynolds-number eddy-viscosity model and/or an explicit algebraic Reynolds stress model. Numerical results are compared with experimental data. In case of impinging jet flow, the heat transfer is also solved.
|
|
Atomistické simulace uspořádávání v niklových slitinách pod vlivem mechanického napětí
Buršík, Jiří
Systems containing up to six alloing elements typical of advanced Ni-based superalloys were modelled.their ordering was simulated at atomic level using a Monte Carlo approach with púeriodic boundary conditions and Kawasaki dynamics.molecular dynamics routines were embedded into standard kinetic Ising model to account for relaxing of local atomic positions.Straining computer experiments show that elastic parameters and bulk modulus undergo comparatively large changes at the beginning of ordering process.
|
|
The American Foreign Policy with the Middle East : from the earliest days to the Obama’s mandate
Petraud, Jean-Félix ; Eichler, Jan (advisor) ; Dubský, Zbyněk (referee)
The following dissertation is an attempt of analysis and understanding of the foreign policy of the United States in the Middle East region and its evolution through time. Considering the fact that the Middle East region is or at least used to be a vital region for the United States national interests, the dissertation presents an exhaustive list of major events that have been major shifts in the US foreign policy in the region. The more or less chronological timeline allows the reader to have a better understanding of the evolution of the US foreign policy. The result of the dissertation is the identification of different patterns of foreign policy and to put the spot on the reasons of the changes of these patterns. Nevertheless, the history of the Middle East region and the incredible number of major events through the 2Oth century and the early 21st century make impossible to deal with all of them. Moreover, analysis and comments are based on academic research, but the dissertation remains subjective and may lead to discussions and debates.
|
|
Geomorphological evolution of the Hřebeny Ridge in Brdy
Soukupová, Lenka ; Balatka, Břetislav (referee) ; Kalvoda, Jan (advisor)
4 ABSTRACT The main aims of presented study about the geomorphology of the Hřebeny Ridge in Brdy Mts. are 1/ the documentation of landform patterns and 2/ the description of main stages of the relief evolution. In opening chapters of the paper, the natural envi- ronments of the Hřebeny Ridge and Brdy Mts. as a whole are characterized. In the fol- lowing chapter, a reflection of the geological structure in present-day landforms is de- scribed. Landform analysis of the studied region related to climate-morphogenetic pro- cesses is presented and detailed geomorphological map (1:10 000) is enclosed. Final part of the study is concerned with main stages of the landform evolution of the Hřebeny Ridge. Field observation and its geomorphological interpretation are compared with earlier regional studies. The presented paper demonstrates that landforms of the Hřebeny Ridge in Brdy Mts. are determined by the geological structure, e.g. by the geomorphological resistance of rocks. Present-day landforms of the Hřebeny Ridge evolved in the Quaternary. Im- portant processes of the landform evolution of the region are connected with the origin of deep river valleys. The landform patterns of the ridge part and its slopes are essential- ly influenced by the Pleistocene cryogenic weathering of rocks as well as very intensive...
|
| |
|
The nursing process in a patient with complications following a lung transplantation
Goldbrichová, Věra ; Nikodemová, Hana (advisor) ; Kučková, Eva (referee)
You are holding the bachelor thesis which concludes my studies in the 2nd Medical School of Charles University. This thesis is meant for the public arena for those with some knowledge regarding medicine. For the topic of my thesis I have chosen the medical care process for a patient with complications after a lung transplant. The objective of this project is to present to the reader questions and answers regarding lung transplants, with emphasis on the seriousness of such an operation giving detail to some of the problems which may arise and the care required. These are issues which a nurse may, and most likely will, be faced with in her profession. The thesis is structured into two basic parts. The first, the theoretical section, is about the anatomy of the respiratory system and lung transplants. With the main detail describing the care required after a transplant and frequently experienced complications. In the second, practical section, the actual case of a patient with complications after a lung transplant is discussed in detail. The basic personal history was written up on the first day of care, this is followed by a description of treatment throughout the course of hospitalization and the planned nursing care. In conclusion, the thesis will discuss the final care of the patient and what the project...
|
guest ::
