A Flow Simulator for the Design of Extreme Length Gravel Packs Utilizing Alternate Path Technology

2010 ◽  
Author(s):  
Bharath N. Rao ◽  
Aruna M. Amin
Keyword(s):  
Extreme Length ◽  
Flow Simulator

Integration of an Aggregate Flow Model with a Traffic Flow Simulator

2008 ◽  
Author(s):  
Robert Hoffman ◽  
Jason Burke ◽  
Stephen Augustine ◽  
Dengfeng Sun ◽  
Alexander Bayen ◽  
...  
Keyword(s):  
Traffic Flow ◽  
Flow Model ◽  
Flow Simulator

Unlocking the Limits of Extreme Length in Alternate Path Gravel Packing

2008 ◽  
Author(s):  
Charles S. Yeh ◽  
Scott Clingman ◽  
Bruce A. Dale ◽  
Tracy Moffett ◽  
Larry Harrison ◽  
...  
Keyword(s):  
Extreme Length ◽  
Gravel Packing

scholarly journals Comparison of three types of fiber optic sensors for temperature monitoring in a groundwater flow simulator

2021 ◽  
pp. 112682
Author(s):  
Sandra Drusová ◽  
Wiecher Bakx ◽  
Pieter J. Doornenbal ◽  
R. Martijn Wagterveld ◽  
Victor F. Bense ◽  
...  
Keyword(s):  
Groundwater Flow ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Temperature Monitoring ◽  
Flow Simulator

Unlocking the Limits of Extreme Length in Alternate Path Gravel Packing

2008 ◽  
Author(s):  
Charles Yeh ◽  
Scott Clingman ◽  
Bruce Dale ◽  
Tracy Moffett ◽  
Larry Harrison ◽  
...  
Keyword(s):  
Extreme Length ◽  
Gravel Packing

The Survival of unfed Pediculus humanus corporis, De Geer (Anoplura) at different Temperatures

1941 ◽  
Vol 32 (1) ◽  
pp. 49-51 ◽  
Author(s):  
H. S. Leeson
Keyword(s):  
Practical Reasons ◽  
Pediculus Humanus ◽  
Extreme Length ◽  
Different Temperatures ◽  
Length Of Life

The object of this investigation was to discover the extreme length of life of nymphs and adults of Pediculus humanus corporis, de Geer, when starved at different temperatures. It is important to know this for practical reasons. Though it is impossible to complete the experiments as originally designed, it is considered that such information as has been accumulated should be recorded.

The efficacy of sinus plication in aortic valvuloplasty for bicuspid aortic valve: experiments in a pulsatile flow simulation model

2021 ◽  
Author(s):  
Satoshi Arimura ◽  
Jumpei Takada ◽  
Gohki Nishimura ◽  
Natsuki Nakama ◽  
Eita Kawasaki ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Bicuspid Aortic Valve ◽  
Pulsatile Flow ◽  
Flow Simulation ◽  
Ultrasound Measurement ◽  
Hydrodynamic Effect ◽  
Promising Tool ◽  
Aortic Valvuloplasty ◽  
Flow Simulator

Abstract OBJECTIVES Sinus plication has emerged as a promising tool that can lead to better stability in bicuspid aortic valve (BAV) repair. However, the mechanisms underlying the efficacy of this technique are unclear. We evaluated the hydrodynamic effect of sinus plication using the experimental pulsatile flow simulator and our original BAV model in vitro. METHODS Based on the computed tomography data of a BAV patient who had undergone aortic valvuloplasty, a BAV model (group C, n = 6) was developed with bovine pericardium and vascular prosthesis (J-graft Shield Neo Valsalva 24 mm). We performed sinus plication (group SP, n = 6) in the BAV model and compared hydrodynamic data with the control model in the pulsatile flow simulator. Non-fused cusp angle, annulus diameter and effective height were measured by ultrasonography. RESULTS The average flow was significantly increased in group SP compared to group C (4.24 ± 0.14 l/min vs 4.14 ± 0.15 l/min, respectively, P = 0.034). The mean transvalvular pressure gradient and regurgitant fraction were significantly decreased in group SP compared to group C (11.6 ± 4.3 mmHg vs 16.6 ± 5.0 mmHg, respectively, P = 0.009 and 14.1 ± 2.0% vs 17.4 ± 2.1%, respectively, P = 0.001). Ultrasound measurement indicated that non-fused cusp angle was significantly increased in group SP compared to group C (163.8° ± 9.2° vs 153.0° ± 4.6°, respectively, P = 0.012). CONCLUSIONS Sinus plication in the BAV model significantly increased the commissural angle. It was effective in not only controlling regurgitation but also improving valve opening. These finding should be confirmed by evaluating cusp stress and/or long-term durability in the future studies.

Assessment of Chemical Injection to Mitigate Wax Deposition in Unconventional Wells

2021 ◽  
Author(s):  
Rafael M. D. Rosa ◽  
Arthur B. Soprana ◽  
Vinicius Girardi ◽  
Fernando M. Villagra
Keyword(s):  
Boundary Conditions ◽  
Multiphase Flow ◽  
Cfd Simulation ◽  
Simulated Data ◽  
Wax Deposition ◽  
Operational Conditions ◽  
Numerical Assessment ◽  
Minimum Depth ◽  
Flow Simulator ◽  
Environmental Temperatures

Abstract This work presents a numerical assessment of chemical inhibitor injection to mitigate wax deposition in unconventional wells. The goal of this study is to simulate the deposition of wax under several operational conditions and later optimize the chemical inhibitor injection position, using two different types of numerical simulations. A transient one-dimensional multiphase flow simulator - ALFAsim, with a dedicated wax model, was used to predict flow conditions such pressure, temperature, holdup and flow pattern profiles, as well the position and rates that wax accumulates. The results from the 1D simulation were then used as boundary conditions in a 3D CFD simulator, which aimed to assess how long it would take to a satisfactory homogenization of the inhibitor with the flow and what would be the minimum depth for the injector should be installed. In this work, a 1D multiphase flow simulator with wax deposition model was used to identify on which operational conditions (flow rates and environmental temperatures) an unconventional well would start to present wax deposition on its tubing walls. After defining the susceptible region where the paraffin could deposit, it was important to verify if the inhibitor would be well homogenized with the stream when reaching this region. For that, a 3D CFD simulation was performed, using information obtained directly from the 1D simulator as boundary conditions. The CFD model was capable to show the mixing evolution of the inhibitor with the stream and it was possible to determine the minimum distance where the injector should be placed to guarantee such homogeneity. A real well was selected to provide comparisons between field observations and simulated data, in order to validate the model assumptions and accuracy.

Modelling Complex Well Behaviour in the Field Using a Transient Multiphase Flow Simulator (Russian)

2018 ◽  
Author(s):  
Kanat Karatayev ◽  
Beibit Bissakayev ◽  
Tamer Saada ◽  
Benjamin Madeley ◽  
Alberto Brancolini ◽  
...  
Keyword(s):  
Multiphase Flow ◽  
Flow Simulator ◽  
Transient Multiphase Flow ◽  
Complex Well
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