Finite Element Prediction of Multi-Size Particulate Flow through Three-Dimensional Channel: Code Validation

Flow through centrifugal pump casing is highly complex in nature due to the complex geometry of the casing. While simplified two dimensional modeling of pump casing reveals the overall flow pattern and pressure distribution, a complete 3D model of pump casing is essential to fully capture the interaction of the primary main stream flow and the secondary flows especially in areas of heavy recirculation. This paper presents steady state finite element simulation of multi-size particulate slurry flow through three dimensional pump casing. The flow field and concentration distribution is presented for different cross-sectional planes. The multi-size particulate flow simulation results are compared with two mono-size particle simulations using (1) the concentration weighted mean diameter of the slurry and (b) the D50 size of the slurry. Qualitative comparison is made with the wear rate predicted by the simulations and the field data. Simulations and field data show that at low flow rates, the side-wall gouging wear near the tongue region becomes significant.

Download Full-text

A Study on Three-Dimensional Seepage of Dam on the Deep Pervious Fracture Rock Foundation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.542-543.1061 ◽

2012 ◽

Vol 542-543 ◽

pp. 1061-1064

Author(s):

Hai Tao Mao ◽

Xiao Ju Wang

Keyword(s):

Finite Element ◽

Fractured Rocks ◽

Three Dimensional ◽

Rock Foundation ◽

Range Limit ◽

Fracture Rock ◽

Seepage Field ◽

Dam Foundation ◽

Flow Through ◽

Hydro Project

The theme of this paper concentrates on hydro- projects’ seepage field in rocks, including the properties of the seepage which flow through both hole qualitative like rocks and fractured rocks. Present the finite element analyzing program which can solve the problem of three dimensional seepage field in hole qualitative rock medium. Apply the program some hydro-project, computed the seepage field in the dam foundation and dam abutments. Besides, further research is done on the decision of the model range limit. And the influence of the pariah shape.

Download Full-text

Finite Element Prediction of Proximal Femoral Fracture Patterns Under Different Loads

Journal of Biomechanical Engineering ◽

10.1115/1.1835347 ◽

2005 ◽

Vol 127 (1) ◽

pp. 9-14 ◽

Cited By ~ 34

Author(s):

M. J. Go´mez-Benito ◽

J. M. Garcı´a-Aznar ◽

M. Doblare´

Keyword(s):

Finite Element ◽

Proximal Femur ◽

Fracture Criterion ◽

Three Dimensional ◽

Proximal Femoral Fracture ◽

Tissue Microstructure ◽

Different Types ◽

Anisotropic Elastic ◽

Type Of Fracture ◽

Finite Element Prediction

The main purpose of this work is to discuss the ability of finite element analyses, together with an appropriate anisotropic fracture criterion, to predict the ultimate load and type of fracture in bones and more specifically in the proximal femur. We show here that the use of a three-dimensional anisotropic criterion provides better results than other well-known isotropic criteria. The criterion parameters and the anisotropic elastic properties were defined in terms of the bone tissue microstructure, quantified by the apparent density and the so-called “fabric tensor”, whose spatial distributions were obtained by means of an anisotropic remodeling model able to capture the main features of the internal structure of long bones. In order to check the validity of the results obtained, they have been compared with those of an experimental work that analyzes different types of fractures induced in the proximal femur by a static overload.

Download Full-text

A Quasi-Three-Dimensional Finite Element Solution for Steady Compressible Flow Through Turbomachines

Volume 1: Turbomachinery ◽

10.1115/82-gt-261 ◽

1982 ◽

Author(s):

A. S. Ücer ◽

İ. Yeġen ◽

T. Durmaz

Keyword(s):

Finite Element ◽

Solution Method ◽

Three Dimensional ◽

Iterative Solution ◽

Field Variable ◽

Dimensional Solution ◽

Subsonic Flows ◽

Dimensional Finite Element ◽

Flow Through ◽

Three Dimensional Finite Element

A quasi-three-dimensional solution method is presented for subsonic flows through turbomachines of arbitrary geometry. Principal equations are based on Wu’s formulation of flow on blade-to-blade and hub-to-shroud surfaces, modified such that the same hub-to-shroud principal equation is used for all types of stream surfaces. Blade-to-blade surfaces are assumed to be surfaces of revolution. A stream function is used as the field variable. The problem is solved by finite element method. An iterative solution is used to find the quasi-three-dimensional solution. Solutions at hub, tip and mid height blade-to-blade surfaces are used to construct a mean hub-to-shroud surface and vice versa, until convergence is obtained. Results indicate that the developed technique is satisfactory for predicting the flow through turbomachine blades.

Download Full-text