scholarly journals The role of high-pressure flow-through experiments for evaluating the mechanical behaviour of gas hydrate-bearing soils

2016 ◽  
pp. 437-443 ◽  
Author(s):  
C Deusner ◽  
E Kossel ◽  
N Bigalke ◽  
M Haeckel ◽  
S Gupta ◽  
...  
Keyword(s):  
High Pressure ◽  
Mechanical Behaviour ◽  
Gas Hydrate ◽  
Pressure Flow ◽  
Flow Through

Investigation of natural gas hydrate slurry flow properties and flow patterns using a high pressure flow loop

2016 ◽  
Vol 146 ◽  
pp. 199-206 ◽  
Author(s):  
Lin Ding ◽  
Bohui Shi ◽  
Xiaofang Lv ◽  
Yang Liu ◽  
Haihao Wu ◽  
...  
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Gas Hydrate ◽  
Flow Patterns ◽  
Flow Properties ◽  
Natural Gas Hydrate ◽  
Slurry Flow ◽  
Flow Loop ◽  
Pressure Flow

Investigation on natural gas hydrate dissociation from a slurry to a water-in-oil emulsion in a high-pressure flow loop

Fuel ◽  
2018 ◽  
Vol 233 ◽  
pp. 743-758 ◽  
Author(s):  
Bo-Hui Shi ◽  
Shang-Fei Song ◽  
Xiao-Fang Lv ◽  
Wen-Qing Li ◽  
Ying Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Gas Hydrate ◽  
Natural Gas Hydrate ◽  
Flow Loop ◽  
Hydrate Dissociation ◽  
Pressure Flow ◽  
Oil Emulsion ◽  
Water In Oil Emulsion

Analysis of THCM coupling in heterogeneous sediments using high-pressure flow-through testing systems

2020 ◽  
Author(s):  
Christian Deusner ◽  
Shubhangi Gupta ◽  
Andrzej Falenty ◽  
Elke Kossel ◽  
Matthias Haeckel
Keyword(s):  
High Pressure ◽  
Spatial Scales ◽  
Gas Production ◽  
Flow Conditions ◽  
Pressure Flow ◽  
Experimental Systems ◽  
Gas Hydrate Formation ◽  
Flow Through ◽  
Heterogeneous Sediments ◽  
Process Coupling

<p>The experimental and numerical investigation of THCM process coupling is important to better understand reservoir geotechnical behavior and sub-surface processes. In particular, when THCM process coupling is dominated by focused fluid migration and localized chemical or microbiological reactions, bulk sediment and, thus, reservoir geotechnical behavior becomes poorly predictable. To improve the understanding of these complicated processes and process coupling on relevant time and spatial scales, it is necessary to combine experimental and numerical simulation approaches, and to develop complementary investigation strategies.    </p><p>We use different high-pressure flow-through experimental systems with triaxial testing units in combination with tomographical imaging tools (e.g. X-ray CT and ERT) to simulate and analyze relevant processes in ocean and earth systems. Our geotechnical studies are carried out at high hydrostatic pressures up to 40 MPa and temperatures between -30°C and 80°C. The experimental systems allow testing of large sample specimen (up to a diameter of 150 mm and a height of 400 mm). In particular, we investigate scenarios with heterogeneous phase distributions and dynamic flow conditions, which cannot be interpreted based on the assumption of homogeneous phase distributions in a sensible manner.</p><p>Here, we focus on discussing experimental and numerical strategies and problems towards understanding geotechnical behavior of heterogeneous sediments, including issues from gas migration in fine-grained sediments (e.g. silty clays), gas hydrate formation under two-phase flow conditions, and localized failure and shear banding in cemented soils. We present results from recent studies on underground usage including gas production and injection scenarios, which are relevant for the understanding of reservoir behavior, storage scenarios and, overall, marine sediment and slope stability. One of the most important aspects is to improve current strategies for combined and complementary experimental and numerical studies, considering that the overall objective is to understand processes on a reservoir scale.</p>

INVESTIGATION OF THE TIME OF GAS FLOW THROUGH A HOLE IN LONG PIPELINES UNDER HIGH PRESSURE

2020 ◽  
Vol 58 (1) ◽  
pp. 30-43
Author(s):  
N.D. Yakimov ◽  
◽  
A.I. Khafizova ◽  
N.D. Chichirova ◽  
O.S. Dmitrieva ◽  
...  
Keyword(s):  
High Pressure ◽  
Gas Flow ◽  
Flow Through

Role of Histamine and Leucotaxin in Function of Cellular Defense Mechanism

1956 ◽  
Vol 184 (2) ◽  
pp. 296-300 ◽  
Author(s):  
László Kátó ◽  
Béla Gözsy
Keyword(s):  
Fluid Flow ◽  
Tissue Damage ◽  
Inflammatory Process ◽  
Defense Mechanism ◽  
Volatile Oils ◽  
Time Intervals ◽  
Cellular Defense ◽  
Intradermal Administration ◽  
Flow Through

Experiments are presented to the effect that in an inflammatory process histamine and leucotaxin appear successively at different and orderly time intervals, thus assuring an increased fluid flow through the capillary wall. Histamine is released not only in the inflammatory process but also by intradermal administration of such substances (volatile oils or their components) which induce neither the triple response of Th. Lewis nor any tissue damage. This could be explained by the fact that in the tissues histamine is ‘present’ but leucotaxin is ‘formed.’

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