Numerical simulations of granular material flow in silos with and without insert

• Autorzy: Wójcik M. , Tejchman J

Warianty tytułu

PL

Numeryczna analiza przepływów materiałów sypkich w silosach z i bez wkładek

• Języki publikacji: EN

Abstrakty

EN

The paper describes results of finite element simulations of confined granular flow in silos with inserts. Attention is laid to the flow pattern and wall pressure distribution during filling and emptying of silos. The calculations are carried out with a finite element code Abaqus. The behaviour of the granular material is described with an isotropic elasto-perfectly plastic constitutive model based on a Drucker-Prager failure criterion. The numerical analysis is performed with the help of an uncoupled Arbitrary Lagrangian-Eulerian (ALE) approach. The calculations are carried out for a plane strain model silo and an axisymmetric large silo assuming different initial densities of sand, wall friction angles, types, shapes and positions of inserts. The numerical results are compared with laboratory experiments and tests in a large silo.

PL

Przedstawiono numeryczne wyniki zachowania się materiału sypkiego podczas przepływu w silosie z wkładkami. Nacisk położony został na wyznaczenie naporu materiałów sypkich na ściany. Analiza numeryczna przeprowadzona została za pomocą metody elementów skończonych i programu ABAQUS, Zastosowano przestrzenno-materialny opis ruchu tzw. "Arbitary Lagrangian-Eulerian". Własności mechaniczne piasku modelowano przy użyciu prostego modelu spreżysto-plastycznego według Druckera-Pragera. Obliczenia wykonane zostały dla modelowego silosu (w płaskim stanie odkształceń) oraz dla dużego osiowo-symetrycznego silosu. W obliczeniach uwzględniono różne początkowe zagęszczenie piasku, szorstkość ścian oraz różny kształt i pozycje wkładek. Wyniki numeryczne porównane zostały z wynikami badań doświadczalnych.

Słowa kluczowe

EN

ALE formulation; elasto-plasticity; finite element method; bulk solid; insert; material flow; silo

PL

materiał sypki; przepływ; silos; analiza numeryczna; elastoplastyczność

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2007
• Tom: Vol. 53, nr 2
• Strony: 293--322
• Opis fizyczny: Bibliogr. 34 poz., il.

Twórcy

autor

Wójcik M.

autor

Tejchman J

• Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, Gdańsk-Wrzeszcz, Poland,

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