Shear Cell for In Situ WAXS, SAXS, and SANS Experiments on Polymer Melts Under Flow Fields

2004 ◽  
Vol 43 (6) ◽  
pp. 1161-1170 ◽  
Author(s):  
Aurora Nogales ◽  
Sarah A. Thornley ◽  
Geoffrey R. Mitchell
Keyword(s):  
Polymer Melts ◽  
Flow Fields ◽  
Shear Cell

New automated shear cell with diamond anvils for in situ studies of materials using X-ray diffraction

2015 ◽  
Vol 37 (1) ◽  
pp. 1-7 ◽  
Author(s):  
N. B. Novikov ◽  
L. K. Shvedov ◽  
Yu. N. Krivosheya ◽  
V. I. Levitas
Keyword(s):  
X Ray Diffraction ◽  
Shear Cell ◽  
X Ray ◽  
In Situ Studies ◽  
Diamond Anvils

scholarly journals Flow fields associated with in situ mineral leaching

1994 ◽  
Vol 36 (2) ◽  
pp. 133-151 ◽  
Author(s):  
Lawrence K. Forbes ◽  
Anthony M. Watts ◽  
Graeme A. Chandler
Keyword(s):  
Simple Model ◽  
Free Boundary ◽  
Numerical Method ◽  
Flow Rate ◽  
Recovery Rate ◽  
Flow Fields ◽  
Vertical Line ◽  
Rate Limiting ◽  
Mineral Leaching

AbstractA simple model for underground mineral leaching is considered, in which liquor is injected into the rock at one point and retrieved from the rock by being pumped out at another point. In its passage through the rock, the liquor dissolves some of the ore of interest, and this is therefore recovered in solution. When the injection and recovery points lie on a vertical line, the region of wetted rock forms an axi-symmetric plume, the surface of which is a free boundary. We present an accurate numerical method for the solution of the problem, and obtain estimates for the maximum possible recovery rate of the liquor, as a fraction of the injected flow rate. Limiting cases are discussed, and other geometries for fluid recovery are considered.

A laboratory fracture shear cell used for simulation of fracture reactivation

2011 ◽  
Vol 51 (1) ◽  
pp. 487 ◽  
Author(s):  
Mohammad Sadegh Asadi ◽  
Vamegh Rasouli
Keyword(s):  
Significant Influence ◽  
Fault Reactivation ◽  
Shear Behaviour ◽  
Rock Fractures ◽  
Normal Stresses ◽  
Shear Tests ◽  
Shear Cell ◽  
In Situ Stresses ◽  
Wide Range

Fault reactivation is an unfavourable incident during drilling and production that may occur due to changes in situ stresses and reservoir pressure. Only a few studies, in their analyses, have included the effects of fault geometrical properties—these are important parameters controlling fault slippage and damage around it. In this paper, the significant influence of fracture morphology on the mechanical behaviour of rock fractures was investigated through experimental studies of shearing rock fractures in the lab. The experiments carried out using a fracture shear cell (FSC): the cell that was modified by adding a number of components to an existing true triaxial stress cell (TTSC) and designing a duplex high pressure cylinder that is capable of applying large normal stresses to the sample at a constant rate. A number of artificial blocks made of mortar material were subjected to shear tests using FSC under a wide range of normal stresses and at different shearing directions. The outputs of uniaxial compressive strength and fracture shear tests in the lab were used to plot the failure envelope of the fractured rock mass and discuss the failure mechanism through shearing. Accordingly, a calibrated, numerical discrete element method (DEM) was used to simulate the shear behaviour of fractures previously tested in the lab. The results of lab tests and DEM simulations will be presented and different failure mechanisms that are expected during shearing will be explained. The results show the significant influence of surface roughness on shear strength and extent of damage zone along the fracture. It was found that the shearing response of fractures depends on the magnitude of normal stress, which indicates the importance of having a good knowledge of in-situ stresses when modelling fault reactivation and damage near the fault zones. The results of lab experiments and numerical simulations were compared and good agreements were observed.

In Situ Investigation of Two-Phase Flow Patterns in Flow Fields of PEFC’s Using Neutron Radiography

Fuel Cells ◽  
2002 ◽  
Vol 2 (2) ◽  
pp. 92-98 ◽  
Author(s):  
A.B. Geiger ◽  
A. Tsukada ◽  
E. Lehmann ◽  
P. Vontobel ◽  
A. Wokaun ◽  
...  
Keyword(s):  
Two Phase Flow ◽  
Neutron Radiography ◽  
Flow Fields ◽  
Flow Patterns ◽  
Phase Flow ◽  
Two Phase ◽  
In Situ Investigation

scholarly journals In Situ Spatiotemporal Mapping of Flow Fields around Seeded Stem Cells at the Subcellular Length Scale

PLoS ONE ◽  
2010 ◽  
Vol 5 (9) ◽  
pp. e12796 ◽  
Author(s):  
Min Jae Song ◽  
David Dean ◽  
Melissa L. Knothe Tate
Keyword(s):  
Stem Cells ◽  
Flow Fields ◽  
Length Scale ◽  
Spatiotemporal Mapping
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