In fluid mechanics and hydraulics, open-channel flow is a type of liquid flow within a conduit with a free surface, known as a channel. The other type of flow within a conduit is pipe flow. These two types of flow are similar in many ways but differ in one important respect: open-channel flow has a free surface, whereas pipe flow does not, resulting in flow dominated by gravity but not hydraulic pressure.
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👉 Open-channel flow in the context of Brays Bayou
Brays Bayou is a slow-moving river in Harris County, Texas. A major tributary of Buffalo Bayou, the Brays flows for 31 miles (50 km) from the western edge of the county, south of Barker Reservoir along the border with Fort Bend County, east to its convergence with the Buffalo at Harrisburg. Nearly all of the river is located within the city of Houston; it is a defining geographic feature of many neighborhoods and districts, including Meyerland, Braeswood Place, the Texas Medical Center, and Riverside Terrace.
As a result of its central route through Harris County, the Brays Bayou watershed is heavily urbanized. Over 700,000 people reside within its 129-square-mile (330 km) drainage area, which contains 124 miles (200 km) of open-channel waterway, mostly from artificial drainage channels. This high level of development, combined with a relative lack of flood control infrastructure, means Brays Bayou is extremely prone to flash flooding events.
In this Dossier
Open-channel flow in the context of Hydraulic
Hydraulics (from Ancient Greek ὕδωρ (húdōr) 'water' and αὐλός (aulós) 'pipe') is a technology and applied science using engineering, chemistry, and other sciences involving the mechanical properties and use of liquids. At a very basic level, hydraulics is the liquid counterpart of pneumatics, which concerns gases. Fluid mechanics provides the theoretical foundation for hydraulics, which focuses on applied engineering using the properties of fluids. In its fluid power applications, hydraulics is used for the generation, control, and transmission of power by the use of pressurized liquids. Hydraulic topics range through some parts of science and most of engineering modules, and they cover concepts such as pipe flow, dam design, fluidics, and fluid control circuitry. The principles of hydraulics are naturally in use in the human body within the vascular system and erectile tissue.
Free surface hydraulics is the branch of hydraulics dealing with free surface flow, such as occurring in rivers, canals, lakes, estuaries, and seas. Its sub-field open-channel flow studies the flow in open channels.
Open-channel flow in the context of Albert Strickler
Albert Strickler (25 July 1887 – 1 February 1963) was a Swiss mechanical engineer recognized for contributions to our understanding of hydraulic roughness in open channel and pipe flow. Strickler proposed that hydraulic roughness could be characterized as a function of measurable surface roughness and described the concept of relative roughness, the ratio of hydraulic radius to surface roughness. He applied these concepts to the development of a dimensionally homogeneous form of the Manning formula.