Autor: Andersson, H. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A new analytical procedure for solving the non-linear differential equation arising in the stretching sheet problem
Autorzy:: Siddheshwar, P. G.
Mahabaleswar, U. S.
Andersson, H. I.
Powiązania:: https://bibliotekanauki.pl/articles/266146.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: równania różniczkowe
ciecz Newtona
rozciąganie arkusza
differential equations
Clairaut equation
Newtonian liquid
stretching sheet
suction/injection
Opis:: The paper discusses a new analytical procedure for solving the non-linear boundary layer equation arising in a linear stretching sheet problem involving a Newtonian/non-Newtonian liquid. On using a technique akin to perturbation the problem gives rise to a system of non-linear governing differential equations that are solved exactly. An analytical expression is obtained for the stream function and velocity as a function of the stretching parameters. The Clairaut equation is obtained on consideration of consistency and its solution is shown to be that of the stretching sheet boundary layer equation. The present study throws light on the analytical solution of a class of boundary layer equations arising in the stretching sheet problem.
Źródło:: International Journal of Applied Mechanics and Engineering; 2013, 18, 3; 955-964
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Quality assessment of atmospheric surface fields over the Baltic Sea from an ensemble of regional climate model simulations with respect to ocean dynamics
Autorzy:: Meier, H.E.M.
Hoglund, A.
Doscher, R.
Andersson, H.
Loptien, U.
Kjellstrom, E.
Powiązania:: https://bibliotekanauki.pl/articles/48250.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: atmosphere-ocean coupling
Baltic region
climate change
climate model
ecosystem
global warming
hydrographic change
regional climate
regional climate modelling
sea ice
temperature
water temperature
Opis:: Climate model results for the Baltic Sea region from an ensemble of eight simulations using the Rossby Centre Atmosphere model version 3 (RCA3) driven with lateral boundary data from global climate models (GCMs) are compared with results from a downscaled ERA40 simulation and gridded observations from 1980 –2006. The results showed that data from RCA3 scenario simulations should not be used as forcing for Baltic Sea models in climate change impact studies because biases of the control climate significantly affect the simulated changes of future projections. For instance, biases of the sea ice cover in RCA3 in the present climate affect the sensitivity of the model’s response to changing climate due to the ice-albedo feedback. From the large ensemble of available RCA3 scenario simulations two GCMs with good performance in downscaling experiments during the control period 1980–2006 were selected. In this study, only the quality of atmospheric surface fields over the Baltic Sea was chosen as a selection criterion. For the greenhouse gas emission scenario A1B two transient simulations for 1961 –2100 driven by these two GCMs were performed using the regional, fully coupled atmosphere-ice-ocean model RCAO. It was shown that RCAO has the potential to improve the results in downscaling experiments driven by GCMs considerably, because sea surface temperatures and sea ice concentrations are calculated more realistically with RCAO than when RCA3 has been forced with surface boundary data from GCMs. For instance, the seasonal 2 m air temperature cycle is closer to observations in RCAO than in RCA3 downscaling simulations. However, the parameterizations of air-sea fluxes in RCAO need to be improved.
Źródło:: Oceanologia; 2011, 53, (1-TI)
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Increasing Precision and Yield in Casting Production by Simulation of the Solidification Process Based on Realistic Material Data Evaluated from Thermal Analysis (Using the ATAS MetStar System)
Autorzy:: Persson, P-E
Ignaszak, Z.
Fransson, H.
Kropotkin, V.
Andersson, R.
Kump, A.
Powiązania:: https://bibliotekanauki.pl/articles/382019.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: ductile iron
simulation
defect prognosis
density calibration
thermal analysis
żeliwo sferoidalne
symulacja
prognozowanie defektów
kalibracja gęstości
analiza termiczna
Opis:: The conducted work shows and confirms how thermal analysis of grey and ductile iron is an important source for calculating metallurgical data to be used as input to increase the precision in simulation of cooling and solidification of cast iron. The aim with the methodology is to achieve a higher quality in the prediction of macro– and micro porosity in castings. As comparison objects standard type of sampling cups for thermal analysis (solidification module M ≈ 0.6 cm) is used. The results from thermal analysis elaborated with the ATAS MetStar system are evaluated parallel with the material quality (including tendency to external and internal defects) of the tested specimen. Significant temperatures and calculated quality parameters are evaluated in the ATAS MetStar system and used as input to calibrate the density curve as temperature function in NovaFlow&Solid simulation system. The modified data are imported to the NovaFlow&Solid simulation system and compared with real results.
Źródło:: Archives of Foundry Engineering; 2019, 1; 109-116
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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