Study the Local Scour around different Shapes of Non-Uniform Piers

2020 ◽  
Vol 20 (1) ◽  
pp. 12-14 ◽  
Author(s):  
Saja I. Ahmed ◽  
Saleh I. Khassaf
Keyword(s):  
Local Scour ◽  
Different Shapes

Comparison of Local Scour Characteristics around Two Eccentric Piers of Different Shapes

2015 ◽  
Vol 41 (4) ◽  
pp. 1199-1213 ◽  
Author(s):  
Subhasish Das ◽  
Rajib Das ◽  
Asis Mazumdar
Keyword(s):  
Local Scour ◽  
Different Shapes

scholarly journals Local Scour around Group Bridge Pier with Different Shapes

2017 ◽  
Vol 132 (3) ◽  
pp. 632-633 ◽  
Author(s):  
M. Günal ◽  
T.A. Gelmeran ◽  
A.Y. Günal
Keyword(s):  
Local Scour ◽  
Bridge Pier ◽  
Different Shapes

scholarly journals Investigation of Local Scour Around Group Bridge Pier with Different Shapes

2019 ◽  
Vol 24 (2) ◽  
pp. 10-22
Author(s):  
Tahseen GELMIRAN ◽  
Khalil Othman ◽  
Mustafa GUNAL
Keyword(s):  
Local Scour ◽  
Bridge Pier ◽  
Different Shapes

Structural phenomena in the growth of carbon nanotubes

1993 ◽  
Vol 51 ◽  
pp. 750-751
Author(s):  
Jun Jiao
Keyword(s):  
Carbon Nanotubes ◽  
Growth Mechanism ◽  
Carbonaceous Material ◽  
Cluster Growth ◽  
Structural Elements ◽  
Rich Variety ◽  
Different Shapes ◽  
Point To Point

HREM studies of the carbonaceous material deposited on the cathode of a Huffman-Krätschmer arc reactor have shown a rich variety of multiple-walled nano-clusters of different shapes and forms. The preparation of the samples, as well as the variety of cluster shapes, including triangular, rhombohedral and pentagonal projections, are described elsewhere.The close registry imposed on the nanotubes, focuses attention on the cluster growth mechanism. The strict parallelism in the graphitic separation of the tube walls is maintained through changes of form and size, often leading to 180° turns, and accommodating neighboring clusters and defects. Iijima et. al. have proposed a growth scheme in terms of pentagonal and heptagonal defects and their combinations in a hexagonal graphitic matrix, the first bending the surface inward, and the second outward. We report here HREM observations that support Iijima’s suggestions, and add some new features that refine the interpretation of the growth mechanism. The structural elements of our observations are briefly summarized in the following four micrographs, taken in a Hitachi H-8100 TEM operating at an accelerating voltage of 200 kV and with a point-to-point resolution of 0.20 nm.

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