AbstractAbstractThe cerebral hemodynamics through the Circle of Willis (CoW) was modeled by coupling a three-dimensional (3D) Computational Fluid Dynamics (CFD) model CoW with one-dimensional (1D) branching tree peripheral vasculature. CFD used to 3D transient flow idealized and patient-specific geometries. A 1D pipe network also predict CoW. The coupled provided useful insight into variation as result possible physiological pathological changes (for example associated ‘onset’ Alzheimer’s...

Abstract Carbon dioxide (CO 2 ) injection into deep depleted hydrocarbon reservoirs or saline aquifers is currently considered the best approach to large‐scale CO storage. Importantly, pore structure and permeability of storage rock are affected by fines release, migration, reattachment in initial stage injection, especially unconsolidated sandstone reservoirs. It thus necessary better understand changes associated evolution during after injection. We imaged an at reservoir conditions before...

Cerebral aneurysms can be treated by coil embolization within the aneurysm sac to alter local hemodynamics and lower wall shear stress (WSS) making aneurysmal flow inactive. This study investigates of a lateral cerebral with coils incorporating fluid-structure interaction (FSI) where effect apparent viscosity on thrombus formation is analysed considering non-Newtonian behaviour blood. Three-dimensional transient incompressible laminar fields were predicted inside at proximal distal neck ends...

Purpose:To compare antegrade and retrograde flow characteristics in a branch of conduit under typical pulsatile pressure flows, seeking an answer to the question: "Does it matter whether inflow vessel is or retrograde?" Methods:A model was built simulate abdominal aorta with designed approximate renal artery. Experiments were conducted measure rates from 40- 200-mm-long tubes simulating configurations. For base case flush origin branch, difference between main adjusted so that average rate...

The blood flow through the circle of Willis was modelled by coupling a Computational Fluid Dynamics (CFD) model with branching tree cerebral vasculature.The small vascular networks, which often cannot be accurately obtained medical imaging, were using fractal that simulated vasculature geometries and flow.This provided realistic mass boundary conditions for outlet arteries Willis.CFD used to three-dimensional transient simplified patient-specific Willis.The patient specific geometry directly...

Poroelastic moduli of rocks are difficult to measure in the laboratory setting. Digital rock technology has potential support interpretation results and provide insights into pore-scale deformation patterns. We apply a digital workflow images obtained for sand pack estimate Biot coefficient drained pore modulus by exploiting its relation bulk solid phase modulus. Comparison with measured values sandstone similar porosities indicate that simulated value is plausible but appears too high. The...

This article presents a modified Eulerian-Lagrangian approach for solving multi-phase flow applied to laboratory-scale gas-liquid separator designed high gas content. The consists of two concentric pipes with swirl tube in the annular space between pipes. mixture comes from tangential side inlet and system works combination gravity centrifugal forces achieve high-efficient separation. In method, is coupled spray wall film models. model involves phenomena requires numerical solution...

We develop a gray-scale lattice Boltzmann (LB) model to study fluid flow combined with heat transfer for through porous media where voxels may be partially solid (or void). Heat in rocks lead deformation, which turn can modulate the and so has significant contribution rock permeability. The LB temperature field is compared finite difference solution of continuum partial differential equations channel. Excellent quantitative agreement found both Poiseuille channel Brinkman flow. then applied...

In today's technologically growing and cost optimisation era, Digital Rock Physics (DRP) is becoming a potential alternative tool to the high time-consuming method of Special Core Analyses (SCAL), for estimation reservoir fluid properties. The key objective this study compare different models predicting drainage relative permeability using pore scale numerical simulation supercritical carbon dioxide brine flow, former being non-wetting phase latter wetting phase. simulations are done on an...

Abstract Residual trapping of CO2 has been identified as a reliable and rapid way to dispose large quantities. Several experimental investigations have completed where residual in sandstone was measured; these programmes that initial saturation rock porosity are significant parameters which influence the thereby capacity effectiveness. In order further improve fundamental understanding computational tool need be developed with saturations can predicted. Pore-scale two-phase fluid flow...

The separation of liquid from gas during the initial stages process is very important in increasing well productivity. This why design an efficient and compact gas-liquid separator has received much attention academic researchers as field operators. They all state necessity deploying separators offshore (and potentially subsea) to enhance recovery wells. investigation describes experimental computational fluid dynamics (CFD) modelling a laboratory-scale designed by CSIRO. consists two...

This paper describes the computational fluid dynamics (CFD) modelling of a laboratory scale gas-liquid separator designed for high gas content. The consists two concentric pipes with swirl tube in annular space between pipes. mixture comes tangentially from side inlet and system works combination gravity centrifugal forces to achieve high-efficient separation. Three dimensional transient multi-phase flows were solved predict velocity volume fraction each phase. standard k- turbulence model...