scholarly journals Using a rotating annular flume to explore disturbance-induced Cd transport mechanisms of dissolved, particulate and deposited sediment

2017 ◽  
Author(s):  
Hua Wang ◽  
Huaiyu Yan
Keyword(s):  
Transport Mechanisms ◽  
Annular Flume ◽  
Rotating Annular Flume ◽  
Cd Transport

scholarly journals Mud-clast armoring and its implications for turbidite systems

2020 ◽  
Vol 90 (7) ◽  
pp. 687-700
Author(s):  
Jamie L. Hizzett ◽  
Esther J. Sumner ◽  
Matthieu J.B. Cartigny ◽  
Michael A. Clare
Keyword(s):  
Deep Sea ◽  
Laboratory Experiments ◽  
Turbidity Current ◽  
Cohesive Sediment ◽  
Apparent Contradiction ◽  
Annular Flume ◽  
Primary Mechanism ◽  
Rotating Annular Flume ◽  
First Time ◽  
Travel Distances

ABSTRACT Seafloor sediment density flows are the primary mechanism for transporting sediment to the deep sea. These flows are important because they pose a hazard to seafloor infrastructure and deposit the largest sediment accumulations on Earth. The cohesive sediment content of a flow (i.e., clay) is an important control on its rheological state (e.g., turbulent or laminar); however, how clay becomes incorporated into a flow is poorly understood. One mechanism is by the abrasion of (clay-rich) mud clasts. Such clasts are common in deep-water deposits, often thought to have traveled over large (more than tens of kilometers) distances. These long travel distances are at odds with previous experimental work that suggests that mud clasts should disintegrate rapidly through abrasion. To address this apparent contradiction, we conduct laboratory experiments using a counter rotating annular flume to simulate clast transport in sediment density flows. We find that as clay clasts roll along a sandy floor, surficial armoring develops and reduces clast abrasion and thus enhances travel distance. For the first time we show armoring to be a process of renewal and replenishment, rather than forming a permanent layer. As armoring reduces the rate of clast abrasion, it delays the release of clay into the parent flow, which can therefore delay flow transformation from turbidity current to debris flow. We conclude that armored mud clasts can form only within a sandy turbidity current; hence where armored clasts are found in debrite deposits, the parent flow must have undergone flow transformation farther up slope.

scholarly journals Sediment Transport of Fine Sand to Fine Gravel on Transverse Bed Slopes in Rotating Annular Flume Experiments

2018 ◽  
Vol 54 (1) ◽  
pp. 19-45 ◽  
Author(s):  
Anne W. Baar ◽  
Jaco de Smit ◽  
Wim S. J. Uijttewaal ◽  
Maarten G. Kleinhans
Keyword(s):  
Sediment Transport ◽  
Fine Sand ◽  
Flume Experiments ◽  
Annular Flume ◽  
Rotating Annular Flume ◽  
Fine Gravel

Numerical modeling of flow characteristics in a rotating annular flume

2000 ◽  
Vol 31 (1-4) ◽  
pp. 271-294 ◽  
Author(s):  
Zhaoqing Yang ◽  
António Baptista ◽  
Jeffrey Darland
Keyword(s):  
Numerical Modeling ◽  
Flow Characteristics ◽  
Annular Flume ◽  
Rotating Annular Flume

Physical Properties of Isolated Perfused Renal Tubular Basement Membranes

1971 ◽  
Vol 29 ◽  
pp. 390-391
Author(s):  
Jared Grantham ◽  
Larry Welling
Keyword(s):  
Basement Membrane ◽  
Basement Membranes ◽  
Transport Mechanisms ◽  
Permeability Characteristics ◽  
Peritubular Capillaries ◽  
Strategic Location ◽  
Tubular Lumen ◽  
Glomerular Filtrate ◽  
Urine Formation ◽  
Renal Tubular

In the course of urine formation in mammalian kidneys over 90% of the glomerular filtrate moves from the tubular lumen into the peritubular capillaries by both active and passive transport mechanisms. In all of the morphologically distinct segments of the renal tubule, e.g. proximal tubule, loop of Henle and distal nephron, the tubular absorbate passes through a basement membrane which rests against the basilar surface of the epithelial cells. The basement membrane is in a strategic location to affect the geometry of the tubules and to influence the movement of tubular absorbate into the renal interstitium. In the present studies we have determined directly some of the mechanical and permeability characteristics of tubular basement membranes.

Alveolobronchiolar transport mechanisms

1973 ◽  
Vol 131 (1) ◽  
pp. 109-114 ◽  
Author(s):  
G. M. Green
Keyword(s):  
Transport Mechanisms

Long-range ballistic transport mechanisms in superconducting spintronics

2016 ◽  
Vol 186 (6) ◽  
pp. 640-646
Author(s):  
Alexei V. Samokhvalov ◽  
Alexander S. Mel'nikov ◽  
Alexander I. Buzdin
Keyword(s):  
Long Range ◽  
Ballistic Transport ◽  
Transport Mechanisms
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