8 to the Bar 8 to the Bar 8 to the Bar is a studio album released by Pete Johnson and Albert Ammons in 1941 on Victor 78rpm set P-69, record numbers 27504 through 27507. It was recorded in two sessions, May 7 and June 17, 1941. It was reissued by RCA Victor in 1952 as a 10-inch LP record as LPT-9. In the United Kingdom, this LP was released by the Gramophone Company as HMV DLP 1011. It was also released as a set of four 45rpm discs, WPT-14. The album peaked at number 2, in 1945, on Billboard's album chart. All titles
Hydraulic diameter also used in calculation of heat transfer in internal-flow problems. For a fully filled duct or pipe whose cross-section is a regular polygon, the hydraulic diameter is equivalent to the diameter of a circle inscribed within the wetted perimeter. Hydraulic diameter The hydraulic diameter, , is a commonly used term when handling flow in non-circular tubes and channels. Using this term, one can calculate many things in the same way as for a round tube. It is defined as where More intuitively, the hydraulic diameter can be understood as a function of the hydraulic radius , which is defined as