Three-Dimensional Isoviscous Flow Velocity Profiles and Resolution in Channels with Modulated Cross-Sectional Permeability for Focusing Field-Flow Fractionation

1991 ◽  
Vol 14 (18) ◽  
pp. 3317-3330 ◽  
Author(s):  
Josef Janca
Keyword(s):  
Flow Velocity ◽  
Three Dimensional ◽  
Velocity Profiles ◽  
Field Flow Fractionation ◽  
Cross Sectional ◽  
Flow Fractionation

scholarly journals Experimental Investigations of Interactions between Sand Wave Movements, Flow Structure, and Individual Aquatic Plants in Natural Rivers: A Case Study of Potamogeton Pectinatus L.

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1166 ◽  
Author(s):  
Łukasz Przyborowski ◽  
Anna Łoboda ◽  
Robert Bialik
Keyword(s):  
Flow Velocity ◽  
Three Dimensional ◽  
Potamogeton Pectinatus ◽  
Sand Wave ◽  
Experimental Investigations ◽  
Cross Sectional ◽  
Bending Tests ◽  
Long Duration ◽  
Elevation Changes

Long-duration measurements were performed in two sandy bed rivers, and three-dimensional (3D) flow velocity and bottom elevation changes were measured in a vegetated area and in a clear region of a river. Detailed flow velocity profiles downstream and upstream of a single specimen of Potamogeton pectinatus L. were obtained and the bed morphology was assessed. Potamogeton plants gathered from each river were subjected to tensile and bending tests. The results show that the existence of the plants was influenced by both bottom and flow conditions, as the plants were located where water velocity was lower by 12% to 16% in comparison to clear region. The characteristics of the flow and sand forms depended on the cross-sectional arrangement of the river, e.g., dunes were approximately four times higher in the middle of the river than in vegetated regions near the bank. Furthermore, the studied hydrophytes were too sparse to affect water flow and had no discernible impact on the sand forms’ movements. The turbulent kinetic energy downstream of a single plant was reduced by approximately 25%. Additionally, the plants’ biomechanical characteristics and morphology were found to have adjusted to match the river conditions.

scholarly journals Three-Dimensional Visualization of Pulmonary Blood Flow Velocity Profiles in Lambs

1992 ◽  
Vol 33 (1) ◽  
pp. 95-111 ◽  
Author(s):  
Hiroshi KATAYAMA ◽  
William HENRY ◽  
Carol L. LUCAS ◽  
Belinda HA ◽  
Jose I. FERREIRO ◽  
...  
Keyword(s):  
Blood Flow ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Pulmonary Blood Flow ◽  
Three Dimensional ◽  
Velocity Profiles
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