An infinite elastic medium with a planar crack is considered. The crack is subjected to the pressure of fluid injected at a point on the crack surface. Description of the crack growth is based on the lubrication equation (balance of the injected fluid and the crack volume), the equation for crack opening caused by fluid pressure on the crack surface, the Poiseuille equation related local fluid ...

BACKGROUND Biotechnological development in shake flask necessitates vital engineering parameters e.g. volumetric power input, mixing time, gas liquid mass transfer coefficient, hydromechanical stress and effective shear rate. Determination and optimization of these parameters through experiments are labor-intensive and time-consuming. Computational Fluid Dynamics (CFD) provides the ability to p...

The study of the carbonate cements in the Permian-Triassic Dalan-Kangan formations resulted in the identification of five stages of calcite and dolomite cementation, which completely or partially occluded pores. Cement types appear to be early isopachous calcite (i; C1-non-luminescence), equant (ii; C2-dull CL), fairly coarse secondary dolomite rhombs (iii; C3-zoning red CL), coarse sparry calc...

introduction: the aim of this study was to evaluate the apical and coronal sealing of endodontic fillings promoted by the associations of sealer 26/gutta-percha, endofill/gutta-percha and resilon/ epiphany. materials and methods: it was used 38 human canines, 10 teeth for each test group and 4 teeth for each control group. after teeth conventional endodontic treatment, they were immersed in sal...

INTRODUCTION Adequate root canal seal following retreatment is essential for a successful outcome. Resilon/Epiphany (R/E) obturation system has been introduced as a substitute for conventional gutta-percha/sealer method. This in vitro study compared the amount of apical microleakage of R/E with gutta-percha/AH26 (GP/AH26) sealer as secondary root canal filling following retreatment in human tee...

Acute heart failure (AHF) is defined as a change in heart failure (HF) symptoms (i.e. dyspnoea, abdominal bloating, and fatigue) and signs (i.e. pulmonary crackles, jugular vein distension, and peripheral oedema) resulting in a need for urgent therapy. Symptoms and signs of HF are due to elevated left and right ventricular filling pressures with or without low cardiac output [1]. Heart failure ...

A new homogenization approach for the simulation of multi-phase flows in heterogeneous porous media is presented. It based on lattice Boltzmann method and combines grayscale with multi-component Shan-Chen method. Thus, it mimics fluid-fluid solid-fluid interactions also within pores that are smaller than numerical discretization. The model successfully tested a broad variety single- two-phase f...

We present a new approach for filling arbitrary holes in Finite Element (FE) models composed of independent meshes which are commonly used in Computer Aided Engineering (CAE). During the preprocessing of an FE model for fluid structure simulation a closed structure hull is required in order to subsequently generate a volume mesh representing the fluid. Today’s complex CAE models include thousan...

692 Heart failure with preserved ejection fraction (HFpEF) remains a common yet vexing clinical syndrome, with no approved therapies despite prevalence, morbidity, and mortality on a par with those of heart failure with reduced ejection fraction. Therapies and devices proven effective in heart failure with reduced ejection fraction have repeatedly fallen short in their application to HFpEF. Thi...