Full text views reflects the number of PDF downloads, PDFs sent to Google Drive, Dropbox and Kindle and HTML full text views. Bernoulli's principle is another key element of fluid dynamics, published in Daniel Bernoulli's 1738 book Hydrodynamica. However, in practice, specialized topics such as hydrodynamic stability and magnetohydrodynamics use the "hydro-" prefix even when they are applying those concepts to the motion of gases. The general flow near a corner between two plane free surfaces is also determined; eddies do not appear in this case. The limiting case of zero angle corresponds to the flow at some distance from a two-dimensional disturbance in a fluid between parallel boundaries. (Apologies if this is not the proper medium through which to bring up these questions/concerns).Nlhw13 (talk) 09:11, 2 February 2017 (UTC), Note to add equations/info on wall shear stress and how it relates to eddy/turbulent fluid flow. Sorry, your blog cannot share posts by email. The ratios of dimensions and intensities of successive eddies are determined for the full range of angles for which the eddies exist. Andrew Zimmerman Jones is a science writer, educator, and researcher. City water systems often use water towers to take advantage of this, so that the elevation difference of the water in the tower (the hydrodynamic head) creates a pressure differential, which is then adjusted with mechanical pumps to get water to the locations in the system where they are needed. The moving fluid creates a space devoid of downstream-flowing fluid on the downstream side of the object. – Turbulent flows are flows. Open-channel flow describes flow in other situations where there is at least one free surface that is not in contact with a rigid boundary. Nlhw13 (talk) 04:03, 13 January 2017 (UTC), All calculations for Eddy size/speed relate back to turbulent flow equations. For example, Mesoscale ocean eddies is a really interesting example of eddies and it's a very thorough section, but I'm not sure if that should be the first section because it's a very specific topic not important to every reader. A current flowing at a constant rate through a straight pipe would be an example of a steady-state flow (and also a steady flow). The moving fluid creates a space devoid of downstream-flowing fluid on the downstream side of the object. The article as a lot of really good information but I think more thought could be put into how the information is organized. The limiting case of zero angle corresponds to the flow at some distance from a two-dimensional disturbance in a fluid between parallel boundaries. Pictures/images provide a decent image/pathway of an eddy, but ultimately the article needs many more cited sources and significant development in the science/math behind eddies and fluid dynamics. That is, the water within an eddy usually has different temperature and salinity characteristics to the water outside of the eddy. Some simple similarity solutions are presented for the flow of a viscous fluid near a sharp corner between two planes on which a variety of boundary conditions may be imposed. When the fluid is electrically conducting, similarity solutions may be obtained when the only applied magnetic field is that due to a line current along the intersection of the two planes; it is shown that the effect of such a current is to widen the range of corner angles for which eddies must appear. When the ocean contains a sea surface height gradient this creates a jet or current, such as the Antarctic Circumpolar Current.