FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2046200516> ?p ?o ?g. }

• W2046200516 endingPage "1903" @default.
• W2046200516 startingPage "1889" @default.
• W2046200516 abstract "The dynamics of pulsed jetting in squids throughout ontogeny is not well understood, especially with regard to the development of vortex rings, which are common features of mechanically generated jet pulses (also known as starting jets). Studies of mechanically generated starting jets have revealed a limiting principle for vortex ring formation characterized in terms of a ;formation number' (F), which delineates the transition between the formation of isolated vortex rings and vortex rings that have; pinched off' from the generating jet. Near F, there exists an optimum in pulse-averaged thrust with (potentially) low energetic cost, raising the question: do squids produce vortex rings and if so, do they fall near F, where propulsive benefits presumably occur? To better understand vortex ring dynamics and propulsive jet efficiency throughout ontogeny, brief squid Lolliguncula brevis ranging from 3.3 to 9.1 cm dorsal mantle length (DML) and swimming at speeds of 2.43-22.2 cms(-1) (0.54-3.50 DMLs(-1)) were studied using digital particle image velocimetry (DPIV). A range of jet structures were observed but most structures could be classified as variations of two principal jet modes: (1) jet mode I, where the ejected fluid rolled up into an isolated vortex ring; and (2) jet mode II, where the ejected fluid developed into a leading vortex ring that separated or ;pinched off' from a long trailing jet. The ratio of jet length [based on the vorticity extent (L(omega))] to jet diameter [based on peak vorticity locations (D(omega))] was <3.0 for jet mode I and >3.0 for jet mode II, placing the transition between modes in rough agreement with F determined in mechanical jet studies. Jet mode II produced greater time-averaged thrust and lift forces and was the jet mode most heavily used whereas jet mode I had higher propulsive efficiency, lower slip, shorter jet periods and a higher frequency of fin activity associated with it. No relationship between L(omega)/D(omega) and speed was detected and there was no apparent speed preference for the jet modes within the speed range considered in this study; however, propulsive efficiency did increase with speed partly because of a reduction in slip and jet angle with speed. Trends in higher slip, lower propulsive efficiency and higher relative lift production were observed for squid <5.0 cm DML compared with squid >/=5.0 cm DML. While these trends were observed when jet mode I and II were equally represented among the size classes, there was also greater relative dependence on jet mode I than jet mode II for squid <5.0 cm DML when all of the available jet sequences were examined. Collectively, these results indicate that approximately 5.0 cm DML is an important ontogenetic transition for the hydrodynamics of pulsed jetting in squids. The significance of our findings is that from early juvenile through to adult life stages, L. brevis is capable of producing a diversity of vortex ring-based jet structures, ranging from efficient short pulses to high-force longer duration pulses. Given that some of these structures had L(omega)/D(omega)s near F, and F represented the delineation between the two primary jet modes observed, fluid dynamics probably played an integral role in the evolution of squid locomotive systems. When this flexibility in jet dynamics is coupled with the highly versatile fins, which are capable of producing multiple hydrodynamic modes as well, it is clear that squid have a locomotive repertoire far more complex than originally thought." @default.
• W2046200516 created "2016-06-24" @default.
• W2046200516 creator A5012425915 @default.
• W2046200516 creator A5037741339 @default.
• W2046200516 creator A5048394844 @default.
• W2046200516 creator A5067135390 @default.
• W2046200516 date "2009-06-15" @default.
• W2046200516 modified "2023-10-10" @default.
• W2046200516 title "Hydrodynamics of pulsed jetting in juvenile and adult brief squid <i>Lolliguncula brevis</i>: evidence of multiple jet `modes' and their implications for propulsive efficiency" @default.
• W2046200516 cites W1419114000 @default.
• W2046200516 cites W1860896303 @default.
• W2046200516 cites W1874450194 @default.
• W2046200516 cites W1923810199 @default.
• W2046200516 cites W1936409437 @default.
• W2046200516 cites W1946416832 @default.
• W2046200516 cites W1947725928 @default.
• W2046200516 cites W1958946079 @default.
• W2046200516 cites W1964404638 @default.
• W2046200516 cites W1964499117 @default.
• W2046200516 cites W1968944548 @default.
• W2046200516 cites W1970874549 @default.
• W2046200516 cites W1972641475 @default.
• W2046200516 cites W1975347483 @default.
• W2046200516 cites W1978245699 @default.
• W2046200516 cites W1989653848 @default.
• W2046200516 cites W1991835929 @default.
• W2046200516 cites W2002754032 @default.
• W2046200516 cites W2009826908 @default.
• W2046200516 cites W2012496237 @default.
• W2046200516 cites W2014546372 @default.
• W2046200516 cites W2016408784 @default.
• W2046200516 cites W2017468487 @default.
• W2046200516 cites W2028716259 @default.
• W2046200516 cites W2031337149 @default.
• W2046200516 cites W2036417293 @default.
• W2046200516 cites W2041754533 @default.
• W2046200516 cites W2049904216 @default.
• W2046200516 cites W2054357893 @default.
• W2046200516 cites W2061715037 @default.
• W2046200516 cites W2062207333 @default.
• W2046200516 cites W2070016266 @default.
• W2046200516 cites W2072291047 @default.
• W2046200516 cites W2073180622 @default.
• W2046200516 cites W2075577923 @default.
• W2046200516 cites W2081736372 @default.
• W2046200516 cites W2091938671 @default.
• W2046200516 cites W2094600071 @default.
• W2046200516 cites W2097759356 @default.
• W2046200516 cites W2100463679 @default.
• W2046200516 cites W2101792569 @default.
• W2046200516 cites W2102993153 @default.
• W2046200516 cites W2103101097 @default.
• W2046200516 cites W2104183816 @default.
• W2046200516 cites W2105595651 @default.
• W2046200516 cites W2106585095 @default.
• W2046200516 cites W2113090794 @default.
• W2046200516 cites W2116049826 @default.
• W2046200516 cites W2116493094 @default.
• W2046200516 cites W2117788362 @default.
• W2046200516 cites W2120058346 @default.
• W2046200516 cites W2120090747 @default.
• W2046200516 cites W2121494634 @default.
• W2046200516 cites W2124062170 @default.
• W2046200516 cites W2124560160 @default.
• W2046200516 cites W2131057596 @default.
• W2046200516 cites W2132924225 @default.
• W2046200516 cites W2134286727 @default.
• W2046200516 cites W2136904711 @default.
• W2046200516 cites W2142420233 @default.
• W2046200516 cites W2142566278 @default.
• W2046200516 cites W2143833377 @default.
• W2046200516 cites W2147137013 @default.
• W2046200516 cites W2148362313 @default.
• W2046200516 cites W2152036705 @default.
• W2046200516 cites W2152906743 @default.
• W2046200516 cites W2153624629 @default.
• W2046200516 cites W2154159138 @default.
• W2046200516 cites W2158931237 @default.
• W2046200516 cites W2161857274 @default.
• W2046200516 cites W2162513169 @default.
• W2046200516 cites W2164474692 @default.
• W2046200516 cites W2166180829 @default.
• W2046200516 cites W2167760874 @default.
• W2046200516 cites W2168389986 @default.
• W2046200516 cites W2168977452 @default.
• W2046200516 cites W2181790860 @default.
• W2046200516 cites W2334439024 @default.
• W2046200516 cites W2340706994 @default.
• W2046200516 cites W2346044987 @default.
• W2046200516 cites W2466897057 @default.
• W2046200516 cites W2500751305 @default.
• W2046200516 cites W3040937257 @default.
• W2046200516 cites W4210291279 @default.
• W2046200516 cites W4251786266 @default.
• W2046200516 cites W984092848 @default.
• W2046200516 doi "https://doi.org/10.1242/jeb.027771" @default.
• W2046200516 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19483007" @default.
• W2046200516 hasPublicationYear "2009" @default.

• next