{"title":"BIFURCATION PHENOMENA IN THE SHORT TAYLOR-COUETTE CAVITY WITH THE ASYMMETRIC END-WALLS AT LOW Re","authors":"E. Tuliszka-Sznitko","doi":"10.1615/tfec2020.fli.032358","DOIUrl":null,"url":null,"abstract":"The paper presents the results of the numerical investigations (DNS) of unsteady phenomena observed in the short Taylor-Couette configurations (=H/(R2-R1)=2.6-4.0) of different radii ratios η=R1/R2=0.25-0.6 with the asymmetric end-wall boundary conditions. The computations are performed at low Reynolds numbers i.e. Re=R1(R2-R1)/=100-200. In such configurations many interesting bifurcation phenomena occur: homoclinic, heteroclinic and doubling period. The paper is thought as complementary to Mullin, Blohm [1] where the analysis is limited to =0.5. The present DNS results confirm that for =0.5 the flow dynamics is organized by a pair of codimension-2 bifurcation points. The DNS study has allowed for the determination of the neutral curves in the 3D parameter space (Re, ) and the detailed analysis of the modulated rotating waves for different . The study has shown that the MRW behavior depends strongly on and Re. These results are presented in the light of Lopez et al. [2] observations.","PeriodicalId":434777,"journal":{"name":"Proceeding of 5th Thermal and Fluids Engineering Conference (TFEC)","volume":"49 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":"Proceeding of 5th Thermal and Fluids Engineering Conference (TFEC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1615/tfec2020.fli.032358","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The paper presents the results of the numerical investigations (DNS) of unsteady phenomena observed in the short Taylor-Couette configurations (=H/(R2-R1)=2.6-4.0) of different radii ratios η=R1/R2=0.25-0.6 with the asymmetric end-wall boundary conditions. The computations are performed at low Reynolds numbers i.e. Re=R1(R2-R1)/=100-200. In such configurations many interesting bifurcation phenomena occur: homoclinic, heteroclinic and doubling period. The paper is thought as complementary to Mullin, Blohm [1] where the analysis is limited to =0.5. The present DNS results confirm that for =0.5 the flow dynamics is organized by a pair of codimension-2 bifurcation points. The DNS study has allowed for the determination of the neutral curves in the 3D parameter space (Re, ) and the detailed analysis of the modulated rotating waves for different . The study has shown that the MRW behavior depends strongly on and Re. These results are presented in the light of Lopez et al. [2] observations.