Temat: technika numeryczna - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Chemical reaction effects on MHD flow past an impulsively started isothermal vertical plate with uniform mass diffusion
Autorzy:: Chandrakala, P.
Narayana Bhaskar, P.
Powiązania:: https://bibliotekanauki.pl/articles/955191.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: technika numeryczna
płyny lepkie
płyta pionowa
metoda elementów skończonych
chemical reaction
magnetic field
infinite vertical plate
finite differences
Opis:: A numerical technique is employed to derive a solution to the transient natural convection flow of an incompressible viscous fluid past an impulsively started infinite isothermal vertical plate with uniform mass diffusion in the presence of a magnetic field and homogeneous chemical reaction of first order. The governing equations are solved using implicit finite-difference method. The effects of velocity, temperature and concentration for different parameters such as the magnetic field parameter, chemical reaction parameter, Prandtl number, Schmidt number, thermal Grashof number and mass Grashof number are studied. It is observed that the fluid velocity decreases with increasing the chemical reaction parameter and the magnetic field parameter.
Źródło:: International Journal of Applied Mechanics and Engineering; 2014, 19, 2; 419-426
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:: Problem of the moving boundary in continuous casting solved by the analytic-numerical method
Autorzy:: Grzymkowski, R.
Pleszczyński, M.
Hetmaniok, E.
Powiązania:: https://bibliotekanauki.pl/articles/383233.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: information technology
foundry industry
solidification process
numerical techniques
moving boundary problem
technologia informacyjna
przemysł odlewniczy
krzepnięcie stopu
technika numeryczna
problem brzegowy
Opis:: Mathematical modeling of thermal processes combined with the reversible phase transitions of type: solid phase – liquid phase leads to formulation of the parabolic or elliptic moving boundary problem. Solution of such defined problem requires, most often, to use some sophisticated numerical techniques and far advanced mathematical tools. The paper presents an analytic-numerical method, especially attractive from the engineer’s point of view, applied for finding the approximate solutions of the selected class of problems which can be reduced to the one-phase solidification problem of a plate with the unknown a priori, varying in time boundary of the region in which the solution is sought. Proposed method is based on the known formalism of initial expansion of a sought function, describing the field of temperature, into the power series, some coefficients of which are determined with the aid of boundary conditions, and on the approximation of a function defining the freezing front location with the broken line, parameters of which are determined numerically. The method represents a combination of the analytical and numerical techniques and seems to be an effective and relatively easy in using tool for solving problems of considered kind.
Źródło:: Archives of Foundry Engineering; 2013, 13, 1; 33-38
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki