Temat: closure model - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: On the turbulent boundary layer of a dry granular avalanche down an incline. I. Thermodynamic analysis
Autorzy:: Fang, C.
Powiązania:: https://bibliotekanauki.pl/articles/280588.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: closure model
dry granular avalanche
thermodynamics
turbulence
Opis:: Characteristics of the turbulent boundary and passive layers of an isothermal dry granular avalanche with incompressible grains are studied by the proposed zero-order turbulence closure model. The first and second laws of thermodynamics are applied to derive the equilibrium closure relations satisfying turbulence realizability conditions, with the dynamic responses postulated within a quasi-static theory. The established closure model is applied to analyses of a gravity-driven stationary avalanche down an incline to illustrate the distributions of the mean solid content, mean velocity, turbulent kinetic energy and dissipation across the flow layer, and to show the influence of turbulent fluctuation on the mean flow features compared with laminar flow solutions. In this paper, detailed thermodynamic analysis and equilibrium closure relations are summarized, with the dynamic responses, the complete closure model and numerical simulations reported in the second part.
Źródło:: Journal of Theoretical and Applied Mechanics; 2016, 54, 3; 1051-1062
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: On the turbulent boundary layer of a dry granular avalanche down an incline. II – closure model and numerical simulations
Autorzy:: Fang, C.
Powiązania:: https://bibliotekanauki.pl/articles/279373.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: closure model
gravity-driven flow
passive layer
turbulent boundary layer
Opis:: Dynamic responses of the closure relations, specific turbulent Helmholtz free energy and turbulent viscosity are postulated followed by experimental calibrations. The established closure model is applied to analyses of a gravity-driven stationary avalanche with incompressible grains down an incline. While the mean velocity and volume fraction increase from their minimum values on the plane toward maximum values on the free surface exponentially, two-fold turbulent kinetic energies and dissipations evolve in a reverse manner. Most two-fold turbulent kinetic energies and dissipations are confined within the thin turbulent boundary layer immediately above the plane, with nearly vanishing two-fold turbulent kinetic energies and finite two-fold turbulent dissipations in the passive layer. The two layers are similar to those of Newtonian fluids in turbulent boundary layer flows, and are preferable recognized by the distributions of turbulent kinetic energies and dissipations.
Źródło:: Journal of Theoretical and Applied Mechanics; 2016, 54, 4; 1245-1256
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Tiling arbitrarily nested loops by means of the transitive closure of dependence graphs
Autorzy:: Bielecki, W.
Pałkowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/331155.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: tiling
transitive closure
source-to-source compiler
polyhedral model
iteration space slicing
domknięcie przechodnie
kompilator
model wielościenny
Opis:: A novel approach to generation of tiled code for arbitrarily nested loops is presented. It is derived via a combination of the polyhedral and iteration space slicing frameworks. Instead of program transformations represented by a set of affine functions, one for each statement, it uses the transitive closure of a loop nest dependence graph to carry out corrections of original rectangular tiles so that all dependences of the original loop nest are preserved under the lexicographic order of target tiles. Parallel tiled code can be generated on the basis of valid serial tiled code by means of applying affine transformations or transitive closure using on input an inter-tile dependence graph whose vertices are represented by target tiles while edges connect dependent target tiles. We demonstrate how a relation describing such a graph can be formed. The main merit of the presented approach in comparison with the well-known ones is that it does not require full permutability of loops to generate both serial and parallel tiled codes; this increases the scope of loop nests to be tiled.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2016, 26, 4; 919-939
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Short review on atmospheric aerosols source apportionment methods
Autorzy:: Szramowiat, K.
Styszko, K.
Gołaś, J.
Powiązania:: https://bibliotekanauki.pl/articles/115457.pdf
Data publikacji:: 2016
Wydawca:: Fundacja na Rzecz Młodych Naukowców
Tematy:: aerosol
source apportionment
mass closure
positive matrix factorisation
macro-trace model
aerozol
podział źródeł zanieczyszczeń
masa zamknięcia
PMF
model obliczeniowy
Opis:: Appropriate understanding of particulate matter emission sources is required to properly establish the policies aiming at the aerosols emitters’ elimi nation. The article provides a short review on atmospheric aerosols source apportionment methods using three computing models.
Źródło:: Challenges of Modern Technology; 2016, 7, 2; 7-13
2082-2863
2353-4419
Pojawia się w:: Challenges of Modern Technology
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "closure model" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język