FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1690121218> ?p ?o ?g. }

• W1690121218 abstract "In this study, the interaction of a shock wave with an interface between two gases is studied experimentally. The basic mechanism for the initial growth of perturbations on the interface is the baroclinic generation of vorticity which results from the misalignment of the pressure gradient in the shock and the density gradient at the interface. The growth of perturbations soon enters into a nonlinear regime with the appearance of bubbles of light fluid rising into heavy fluid and spikes of heavy fluid falling into light fluid. In the nonlinear regime, interaction between various scales and the appearance of other instabilities, such as Kelvin-Helmholtz instability, along the boundaries of the spikes occur, which results in the breakup of the interface. These processes lead to a turbulent mixing zone (TMZ) which grows with time. The main focus of this study is to understand the growth of TMZ with time in a cylindrical geometry with square cross section and for the the first time study the effect of area convergence in a conical geometry on its growth rate. The present set of experiments is done in the GALCIT 17 in. shock tube with air and sulfur hexafluoride as light and heavy gases. The growth of the TMZ is studied in a straight test section for single-mode initial perturbation consisting of two different wavelength and amplitude combinations at incident shock Mach number of 1.55. The multimode initial perturbation growth at late times is studied in a conical geometry to study the effect of area convergence at incident Mach numbers of 1.55 and 1.39. The results are compared with the experiments of Vetter which were done in the same shock tube with a straight test section with no area convergence and at the same Mach number. In the study of the Richtmyer-Meshkov (RM) instability of single-scale perturbations on air/sulfur-hexafluoride interface in a straight test section, the initially sinusoidal interface is formed by a polymeric membrane of thickness 1.5 micron and the flow visualization is done using schlieren imaging technique. The interface thickness is measured visually from the photographs. It is found that the growth rate decreases rapidly with time with a small dependence on the initial wavelength persisting until late times.In the case of the RM instability, growth of multimode initial perturbations in a conical geometry, it is found from the schlieren flow visualization images that the interface thickness grows about 40-50 % more rapidly than in Vetter's experiments. Experimental results for laser-induced scattering at late times are presented for air/He gas combinations at the interface. In situations when the rear of the interface is not clearly demarcated, the thickness is determined by an image processing technique. This technique is also used to determine the possible dominant eddy/blob size in the TMZ from the schlieren images. Some inviscid computational studies, with a planar or spherical shock interacting with a planar or spherical initial interface in light-heavy (air/sulfur-hexafluoride) and heavy-light (air/He) configurations, are also presented. In the conical geometry there is a reflected shock originating from the triple point. This reflection is a consequence of the transition from the cylindrical shock tube to the converging cone. Due to the vorticity created by the interaction of reflected shock from the cone wall with the interface in initial stage, it is found that the interface curves toward or away from the apex of the cone, depending on the sign of density gradient. This curving of the interface could have a role to play in the diffuse rear boundary of the interface in schlieren flow visualization images but the laser-induced scattering image shows that the mixing zone indeed does not have a well-defined rear boundary. Rather, small blobs of fluids on the right are scattered in the mixing zone. An inviscid computational study is also done on cylindrical and conical test section geometries to study the effect of transverse reflected waves on the growth of small sinusoidal initial perturbations. It is found by comparison with cylindrical geometry (where reflected waves do not exist) that the transverse reflected waves do not affect the growth of perturbations on the interface." @default.
• W1690121218 created "2016-06-24" @default.
• W1690121218 creator A5075472573 @default.
• W1690121218 date "2003-01-01" @default.
• W1690121218 modified "2023-09-24" @default.
• W1690121218 title "An experimental investigation of Richtmyer-Meshkov instability" @default.
• W1690121218 cites W1657347807 @default.
• W1690121218 cites W1898394801 @default.
• W1690121218 cites W1977890286 @default.
• W1690121218 cites W1983308969 @default.
• W1690121218 cites W1988343428 @default.
• W1690121218 cites W1995176739 @default.
• W1690121218 cites W1996828491 @default.
• W1690121218 cites W1998553514 @default.
• W1690121218 cites W2001923450 @default.
• W1690121218 cites W2002588993 @default.
• W1690121218 cites W2026080974 @default.
• W1690121218 cites W2026197445 @default.
• W1690121218 cites W2030903676 @default.
• W1690121218 cites W2034135282 @default.
• W1690121218 cites W2037812149 @default.
• W1690121218 cites W2043259990 @default.
• W1690121218 cites W2045811914 @default.
• W1690121218 cites W2047073733 @default.
• W1690121218 cites W2055931342 @default.
• W1690121218 cites W2066942877 @default.
• W1690121218 cites W2067429963 @default.
• W1690121218 cites W2070696972 @default.
• W1690121218 cites W2074215614 @default.
• W1690121218 cites W2075059754 @default.
• W1690121218 cites W2080656398 @default.
• W1690121218 cites W2084354530 @default.
• W1690121218 cites W2084460913 @default.
• W1690121218 cites W2084477100 @default.
• W1690121218 cites W2096574888 @default.
• W1690121218 cites W2106457576 @default.
• W1690121218 cites W2109451901 @default.
• W1690121218 cites W2111802439 @default.
• W1690121218 cites W2123199375 @default.
• W1690121218 cites W2136246375 @default.
• W1690121218 cites W2150491118 @default.
• W1690121218 cites W2553300563 @default.
• W1690121218 cites W3015038228 @default.
• W1690121218 cites W3095228262 @default.
• W1690121218 cites W194261840 @default.
• W1690121218 doi "https://doi.org/10.7907/nkdr-tt39." @default.
• W1690121218 hasPublicationYear "2003" @default.
• W1690121218 type Work @default.
• W1690121218 sameAs 1690121218 @default.
• W1690121218 citedByCount "0" @default.
• W1690121218 crossrefType "dissertation" @default.
• W1690121218 hasAuthorship W1690121218A5075472573 @default.
• W1690121218 hasConcept C12015475 @default.
• W1690121218 hasConcept C120665830 @default.
• W1690121218 hasConcept C121332964 @default.
• W1690121218 hasConcept C122881758 @default.
• W1690121218 hasConcept C124961601 @default.
• W1690121218 hasConcept C140820882 @default.
• W1690121218 hasConcept C177918212 @default.
• W1690121218 hasConcept C196558001 @default.
• W1690121218 hasConcept C207821765 @default.
• W1690121218 hasConcept C2524010 @default.
• W1690121218 hasConcept C33923547 @default.
• W1690121218 hasConcept C57879066 @default.
• W1690121218 hasConcept C62520636 @default.
• W1690121218 hasConcept C70477161 @default.
• W1690121218 hasConcept C74650414 @default.
• W1690121218 hasConceptScore W1690121218C12015475 @default.
• W1690121218 hasConceptScore W1690121218C120665830 @default.
• W1690121218 hasConceptScore W1690121218C121332964 @default.
• W1690121218 hasConceptScore W1690121218C122881758 @default.
• W1690121218 hasConceptScore W1690121218C124961601 @default.
• W1690121218 hasConceptScore W1690121218C140820882 @default.
• W1690121218 hasConceptScore W1690121218C177918212 @default.
• W1690121218 hasConceptScore W1690121218C196558001 @default.
• W1690121218 hasConceptScore W1690121218C207821765 @default.
• W1690121218 hasConceptScore W1690121218C2524010 @default.
• W1690121218 hasConceptScore W1690121218C33923547 @default.
• W1690121218 hasConceptScore W1690121218C57879066 @default.
• W1690121218 hasConceptScore W1690121218C62520636 @default.
• W1690121218 hasConceptScore W1690121218C70477161 @default.
• W1690121218 hasConceptScore W1690121218C74650414 @default.
• W1690121218 hasLocation W16901212181 @default.
• W1690121218 hasOpenAccess W1690121218 @default.
• W1690121218 hasPrimaryLocation W16901212181 @default.
• W1690121218 hasRelatedWork W1881468554 @default.
• W1690121218 hasRelatedWork W1971314907 @default.
• W1690121218 hasRelatedWork W2007679350 @default.
• W1690121218 hasRelatedWork W2051790266 @default.
• W1690121218 hasRelatedWork W2116389378 @default.
• W1690121218 hasRelatedWork W2119602488 @default.
• W1690121218 hasRelatedWork W2147831063 @default.
• W1690121218 hasRelatedWork W2157764151 @default.
• W1690121218 hasRelatedWork W2327788217 @default.
• W1690121218 hasRelatedWork W2581397888 @default.
• W1690121218 hasRelatedWork W2952556127 @default.
• W1690121218 hasRelatedWork W2953342604 @default.
• W1690121218 hasRelatedWork W3023073570 @default.
• W1690121218 hasRelatedWork W3023755458 @default.
• W1690121218 hasRelatedWork W3045705693 @default.

• next