Results 211 to 220 of about 17,042 (246)

Parallel block–selective algebraic multigrid in foam‐extend

PAMM, 2019
AbstractWe present an extension of a well–known classic algebraic multigrid algorithm, where coarsening is based on selection of equations, for an implicitly coupled pressure–velocity system discretised by the finite volume (FV) method. The resulting coefficient matrix of the linear system is point–ordered, and there are 4 equations for each FV cell ...
Uroić, Tessa, Jasak, Hrvoje
openaire   +2 more sources

Flexible Polyurethane Foam Extended with Corn Starch

1997
The use of polyurethane foam is continuing to grow at a rapid pace throughout the world. This growth can be attributed to their light weight, excellent strength/weight ratio, energy absorbing performance (including shock, vibration, and sound), and comfort features of the polyurethane foams (Klempner and Frisch, 1991).
Ying-chun Lin, Harold E. Huff, Fu-hung Hsieh   +2 more
openaire   +1 more source

Water-blown flexible polyurethane foam extended with biomass materials

Journal of Applied Polymer Science, 1997
Soy protein isolate, soy fiber, and cornstarch (0–40% polyether polyol) were incorporated into a flexible polyurethane foam formulation. Stress–strain curves of the control foam and foams containing 10–20% biomass material exhibit a considerable plateau stress region but not for foams extended with 30–40% biomass materials.
Y. Lin, F. Hsieh
openaire   +1 more source

Comparative study of physical properties of water-blown rigid polyurethane foams extended with commercial soy flours

Journal of Applied Polymer Science, 2001
The use of renewable resources (mainly carbohydrates) in rigid polyurethane foam has been known to offer several advantages, such as increased strength, improved flame resistance, and enhanced biodegradability. Less attention has been directed to inexpensive protein-based materials, such as defatted soy flour.
Li-Chung Chang, Yu Xue, Fu-Hung Hsieh
openaire   +1 more source

Block-selective algebraic multigrid in foam-extend

2017
This paper presents the selective algebraic multigrid algorithm for solving the linearised implicitly coupled pressure-velocity system.
Jasak, Hrvoje, Uroić, Tessa
openaire  

Manoeuvring simulations using the overset grid technology in foam-extend

2018
Full scale turning circle manoeuvre is simulated using the Finite Volume (FV) based CFD software called the Naval Hydro Pack, which is based on foam-extend. Results are directly compared to sea trial measurements for two propeller rotation rates. Two different approaches for modelling the free surface are investigated: as single–phase flow model with a
Gatin, Inno, Vukčević, Vuko, Jasak, Hrvoje, Lalović, Igor   +3 more
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Immersed Boundary Surface Method in foam-extend

2018
Objective • Present the new (stabilised) formulation of the Immersed Boundary Method in foam-extend: Immersed Boundary Surface (IBS) • Provide examples from hydraulic engineering Topics • Background: Immersed Boundary Method in foam- extend • New algorithm: Immersed Boundary Surface (IBS) Method • Imposition of boundary conditions • Validation: Simple ...
openaire  

Wave Diffraction CFD Nonlinear Time–Spectral Simulations in foam–extend

2016
Harmonic Balance (HB) method is applied to the problems of surface gravity waves in the Naval Hydro pack in foam–extend, which enables time–spectral simulations of wave diffraction. HB transforms a transient problem into a set of coupled steady state equations by assuming a temporally periodic flow.
Gatin, Inno, Jasak, Hrvoje, Vukčević, Vuko   +2 more
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pUCoupledFoam - an open source coupled incompressible pressure-velocity solver based on foam-extend

2014
Due to the general slow convergence of steady-state incompressible solvers, coupled ap- proaches are attractive alternatives. Such implicit solvers are well suited within the ex- isting generic block matrix format available with foam-extend. In this work, new implicit discretisation operators as well as assembling tools and matrix solvers are described
Jasak, Hrvoje, Vukčević, Vuko
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Rigid Urethane Foam Extended with Starch

Journal of Cellular Plastics, 1967
Florence L. Bennett, F.H. Otey, C.L. Mehltretter   +2 more
openaire   +1 more source