{"title":"非平衡液体中远程密度相关的动态光散射","authors":"B. Law, R. Gammon, J. Sengers","doi":"10.1364/pcta.1988.pcs147","DOIUrl":null,"url":null,"abstract":"We have performed small-angle Rayleigh scattering measurements in toluene removed far from equilibrium by a large stabilizing temperature gradient. The experiments demonstrate the existence of long-range density correlations through a strong enhancement of the thermal fluctuations and they also reveal a negative contribution at shorter-time scales from the viscous fluctuations in agreement with the theoretical predictions. The experiments confirm that both effects vary with (∇T)2/q4, where ∇T is the temperature gradient and q the wave number of the fluctuations.","PeriodicalId":371566,"journal":{"name":"Photon Correlation Techniques and Applications","volume":"74 5 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dynamic Light Scattering from Long-Range Density Correlations in a Nonequilibrium Liquid\",\"authors\":\"B. Law, R. Gammon, J. Sengers\",\"doi\":\"10.1364/pcta.1988.pcs147\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We have performed small-angle Rayleigh scattering measurements in toluene removed far from equilibrium by a large stabilizing temperature gradient. The experiments demonstrate the existence of long-range density correlations through a strong enhancement of the thermal fluctuations and they also reveal a negative contribution at shorter-time scales from the viscous fluctuations in agreement with the theoretical predictions. The experiments confirm that both effects vary with (∇T)2/q4, where ∇T is the temperature gradient and q the wave number of the fluctuations.\",\"PeriodicalId\":371566,\"journal\":{\"name\":\"Photon Correlation Techniques and Applications\",\"volume\":\"74 5 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1900-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Photon Correlation Techniques and Applications\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1364/pcta.1988.pcs147\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Photon Correlation Techniques and Applications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1364/pcta.1988.pcs147","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Dynamic Light Scattering from Long-Range Density Correlations in a Nonequilibrium Liquid
We have performed small-angle Rayleigh scattering measurements in toluene removed far from equilibrium by a large stabilizing temperature gradient. The experiments demonstrate the existence of long-range density correlations through a strong enhancement of the thermal fluctuations and they also reveal a negative contribution at shorter-time scales from the viscous fluctuations in agreement with the theoretical predictions. The experiments confirm that both effects vary with (∇T)2/q4, where ∇T is the temperature gradient and q the wave number of the fluctuations.
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