National Repository of Grey Literature 23 records found  beginprevious21 - 23  jump to record: Search took 0.00 seconds. 
Regelation of patterned ground in the High Tatras.
Pechačová, Blanka ; Křížek, Marek (advisor) ; Voják, Karel (referee)
Regelation (freeze-thaw cycles) is the collective term used for a process of alternate freezing and thawing of water and solutions into the soil or bedrock. The series of geomorphological and pedological processes such as migration of soil water, formation of segregated ice or frost heaving, is connected with regelation. Condition of freezing-thawing process is a phase transition of water that leads to an important phenomenon - a release or consumption of latent heat. This phenomenon can be observed from the data obtained by measuring the temperature in the soil profile. In the present bachelor thesis, here are investigated sites of sorted patterned ground (Hincovo pleso, Lučné sedlo) and earth hummocks (Kopské sedlo) in the High Tatras for the purposes of the study regelation process. In addition to detailed description of the physical-geomorphological processes associated with phase changes of water in patterned groud, the main aim of the thesis is to set regelation cycles and their characteristics using different methods for determination of regelation on the basis of temperature measurements in patterned groug of the foregoing locations. The results indicate differences in regelation in the individual shapes within the locations, among the sites, but also between different types of patterned groud -...
Computer modeling of heat transfer problems with phase changes in MATLAB
Zálešák, Martin ; Mauder, Tomáš (referee) ; Klimeš, Lubomír (advisor)
The thesis deals with numerical modeling of heat transfer problems in materials undergoing phase changes. The effective heat capacity method was used for modeling of phase change. The method was implemented in a form of programs created in software MATLAB. Their functionality was verified by means of computer simulations applied to selected test problems. The simulated results were analysed and evaluated.

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