Wszystkie pola: simple flows - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Simple flows of pseudoplastic fluids based on DeHaven model
Autorzy:: Walicka, A.
Powiązania:: https://bibliotekanauki.pl/articles/266230.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: DeHaven fluids
similar fluids
simple flows
płyn lepkosprężysty
reologia
łożysko
Opis:: In this paper three simple flows of visco-plastic fluids of DeHaven type or fluids similar to them are considered. These flows are: Poiseuille flow in a plane channel, Poiseuille flow through a circular pipe and rotating Couette flow between two coaxial cylinders. After presentation DeHaven model it was presented some models of fluids similar to this model. Next it was given the solutions of equations of motion for three flows mentioned above.
Źródło:: International Journal of Applied Mechanics and Engineering; 2017, 22, 4; 1035-1044
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:: Basic flows of generalized second grade fluids based on a Sisko model
Autorzy:: Walicka, A.
Powiązania:: https://bibliotekanauki.pl/articles/264558.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: Sisko fluids
similar fluids
simple flows
przepływ płynu lepkiego
lepkoplastyczność
przepływ Poiseuille'a
Opis:: The present investigation is concerned with basic flows of generalized second grade fluids based on a Sisko fluid. After formulation of the general equations of motion three simple flows of viscoplastic fluids of a Sisko type or fluids similar to them are considered. These flows are: Poiseuille flow in a plane channel, Poiseuille flow in a circular pipe and rotating Couette flow between two coaxial cylinders. After presentation the Sisko model one was presented some models of fluids similar to this model. Next it was given the solutions of equations of motion for three flows mentioned above.
Źródło:: International Journal of Applied Mechanics and Engineering; 2017, 22, 4; 1019-1033
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: 3.

Tytuł:: Optimality and stability result for bang-bang optimal controls with simple and double switch behaviour
Autorzy:: Felgenhauer, U.
Poggiolini, L.
Stefani, G.
Powiązania:: https://bibliotekanauki.pl/articles/970776.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:: bang-bang control
parametric control problems
Hamiltonian flows
Opis:: The paper considers parametric optimal control problems with bang-bang control vector function. For this problem we give regularity and second-order optimality conditions at the nominal solution which are sufficient to: (i) existence and local uniqueness of extremals, (ii) local structure stability, (iii) strong local optimality, under parameter perturbations. Here "local" means in a L∞ neighbourhood of the nominal trajectory, regardless of the control values. Stability results were obtained by the first author using the shooting approach, while optimality results were obtained by the other authors, using the Hamiltonian approach. The paper, combining both approaches, allows to unify the assumptions and to close some gaps between optimality and stability results.
Źródło:: Control and Cybernetics; 2009, 38, 4B; 1305-1325
0324-8569
Pojawia się w:: Control and Cybernetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Estimation of Filtration Efficiency – from Simple Correlations to Digital Fluid Dynamics
Autorzy:: Przekop, R.
Powiązania:: https://bibliotekanauki.pl/articles/185743.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: filtration
lattice Boltzmann
Brownian dynamics
multiphase flows
porous media
filtrowanie
krata Boltzmanna
Dynamika Browna
przepływy wielofazowe
Opis:: Aerosol filtration in fibrous filters is one of the principal methods of accurate removal of particulate matter from a stream of gas. The classical theory of depth filtration of aerosol particles in fibrous structures is based on the assumption of existing single fibre efficiency, which may be used to recalculate the overall efficiency of entire filter. Using “classical theory” of filtration one may introduce some errors, leading finally to a discrepancy between theory and experiment. There are several reasons for inappropriate estimation of the single fibre efficiency: i) neglecting of shortrange interactions, ii) separation of inertial and Brownian effects, ii) perfect adhesion of particles to the fibre, iv) assumption of perfect mixing of aerosol particles in the gas stream, v) assumption of negligible effect of the presence of neighbouring fibres and vi) assumption of perpendicular orientation of homogenous fibres in the filtration structure. Generally speaking, “classical theory” of filtration was used for characterization of the steady - state filtration process (filtration in a clean filter, at the beginning of the process) without deeper investigation of the influence of the nternal structure of the filter on its performance. The aim of this review is to outline and discuss the progress of deep-bed filtration modelling from the use of simple empirical correlations to advanced techniques of Computational Fluid Dynamics and Digital Fluid Dynamics.
Źródło:: Chemical and Process Engineering; 2017, 38, 1; 31-50
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

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