circulation time

Noun

circulation time (countable and uncountable, plural circulation times)

1. (drilling) The amount of time required for mud to circulate from the suction pit, enter into the wellbore and then return to the surface.
   • To use this solution for any value of circulation time, we introduce below the adjusted circulation time.2015, Izzy M. Kutasov, Lev V. Eppelbaum, Pressure and Temperature Well Testing, page 14
   • The engineer requires knowledge of the circulation time if the drilling mud is to be changed.2018, Werner Kass, Tracing Technique in Geohydrology, page 513
2. The time it takes for a fluid to complete its circuit of the body, especially the time it takes blood to circulate.
   • Table II shows the results of measurements of the diastolic volume of the heart, the stroke output of the heart, the mechanical work of the heart, the circulation time and calculated increase in mechanical efficiency of the heart as well as the venous pressure in the systemic circulation in cases...1949, Cecil James Watson, Outlines of Internal Medicine - Volumes 1-5, page 256
   • No correlation has been found between blood pressure and circulation time in either healthy or diseased individuals (Blumgart & Weiss 1927, Olsone 1941, Kerpel-Fronius 1950).1953, Leena Tuuteri, On the Circulation Time and the Oxygen Saturation of Sinus Blood in Severe Infantile Gastroenteritis, page 24
3. The time in which capital is bound up the form of a commodity; the time in which a manufactured item is in use.
   • tracing the precise circulation routes and circulation time of exchange goods may offer finer detail on social questions, cf. Frankenstein and Rowlands ( 1978 ).1984, John L. Bintliff, European Social Evolution: Archaeological Perspectives, page 28
   • This would seem to confirm our hypothesis that increasing circulation time reflects periods of declining supplies of bronze.1984, Matthew Spriggs, Marxist Perspectives in Archaeology, page 92
4. The time it takes oceanwater, moving via currents, to move between two points, or to complete a cycle back to its starting point.
   • Ê is scaled by the circulation time and a factor to remove the salinity dimension.1996, Natural Climate Variability on Decade-to-Century Time Scales, page 359
   • The aging from the Southern Ocean to the North Pacific, expressed in a δ¹⁴C decrease of 90 to 100%, requires a circulation time from the Southern Ocean to the North Pacific of the order of 950 years.2007, Hendrik M. van Aken, The Oceanic Thermohaline Circulation: An Introduction, page 96
5. The amount of time that a fluid takes to complete a cycle around a vessel in which it is being mixed or stirred.
   • This is the same order of magnitude as circulation time and mixing time for large fermenters.1991, Klaas van't Riet, Johannes Tramper, Basic Bioreactor Design, page 403
   • As stated previously, both time to equilibrium and the competition between coalescence and dispersion depend on circulation time.2003, Edward L. Paul, Victor A. Atiemo-Obeng, Suzanne M. Kresta, Handbook of Industrial Mixing: Science and Practice, page 729
6. The amount of time that elapses in a multiprocess system from the time when a process is loaded for execution until the time when the same process is next loaded for more processing.
   • The circulation time of a slot in front of an access window has been chosen as the basic unit of time.1982, Cees J. van Spronsen, Lutz Richter, Microsystems: Architecture, Integration, and Use, page 24
   • The first record for the day gives a base time, while subsequent records for the day each have a circulation time associated with them; the circulation time is thus calculated by subtracting from the current log-on time the log-on time of the previous run by the same user.2001, Per Brinch Hansen, Classic Operating Systems, page 94