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Wyszukujesz frazę "Bochenek, Bogdan" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Using ALARO and AROME numerical weather prediction models for the derecho case on 11 August 2017
Autorzy:
Kolonko, Marcin
Szczęch-Gajewska, Małgorzata
Bochenek, Bogdan
Stachura, Gabriel
Sekuła, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2166586.pdf
Data publikacji:
2022
Wydawca:
Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
Tematy:
derecho
mesocyclone convective system
mesoscale convective vortex
numerical weather prediction model
ALARO model
AROME model
Opis:
On average, a derecho occurs once a year in Poland while bow echoes happen several times per year. On 11 August 2017, severe meteorological phenomena were observed in Poland, including extremely strong wind gusts. We focused especially on the convective windstorm of a derecho type which occurred on that date in northern and north-western Poland. A rapidly moving mesoscale convective system (MCS) resulted in a bow echo, a mesoscale convective vortex (MCV), and finally fulfilled the criteria for a derecho. To establish whether our operational models in the Institute of Meteorology and Water Management, National Research Institute (IMGW-PIB) could reproduce a derecho of such intensity as that of 11 August 2017, the results from two mesoscale numerical weather prediction models were analyzed. The Application of Research to Operation at Mesoscale (AROME) and the ALADIN & AROME (ALARO) models were applied in the non-hydrostatic regime. We also examine how models differ with respect to mesoscale convective system drivers (such as vertical wind shear and convective available potential energy) and representation of deep convection (e.g., vertical velocities, cold pool generation). Forecasts are compared with observations of wind gusts and radar data. Severe weather phenomena, such as rear inflow jet and cold pool, were predicted by both models, visible on the maps of the wind velocity at 850 and 925 hPa pressure levels and on the map of air temperature at 2 m above the ground level, respectively. Relative vorticity maps of the middle and lower troposphere were analyzed for understanding the evolution of MCV.
Źródło:
Meteorology Hydrology and Water Management. Research and Operational Applications; 2022, 10, 2; 1--25
2299-3835
2353-5652
Pojawia się w:
Meteorology Hydrology and Water Management. Research and Operational Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Topology algorithm built as an automaton with flexible rules
Autorzy:
Tajs-Zielińska, Katarzyna
Bochenek, Bogdan
Powiązania:
https://bibliotekanauki.pl/articles/2086875.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
topology optimization
cellular automaton
flexible update rules
optymalizacja topologii
automat komórkowy
zasady aktualizacji elastyczne
Opis:
Developing novel methods, approaches and computational techniques is essential for solving efficiently more and more demanding up-to-date engineering problems. Designing durable, light and eco-friendly structures starts at the conceptual stage, where new efficient design and optimization tools need to be implemented. Nowadays, apart from the traditional gradient-based methods applied to optimal structural and material design, innovative techniques based on versatile heuristic concepts, like for example Cellular Automata, are implemented. Cellular Automata are built to represent mechanical systems where the special local update rules are implemented to mimic the performance of complex systems. This paper presents a novel concept of flexible Cellular Automata rules and their implementation into topology optimization process. Despite a few decades of development, topology optimization still remains one of the most important research fields within the area of structural and material design. One can notice novel ideas and formulations as well as new fields of their implementation. What stimulates that progress is that the researcher community continuously works on innovative and efficient topology optimization methods and algorithms. The proposed algorithm combined with an efficient analysis system ANSYS offers a fast convergence of the topology generation process and allows obtaining well-defined final topologies.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 5; e138813, 1--17
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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