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Topic

An elastic Taylor-Couette flow instability

Guest Editor:

        • Abstract Submission Deadline : 30/11/2023

        Manuscript Submission Deadline : 25/12/2023

        [This article belongs to Special Issue An elastic Taylor-Couette flow instability under section ijcmm, ijcmm in (ijcmm, ijcmm)]

        Special Issue Description

        The Taylor-Couette flow of dilute polymer solutions is found to exhibit a non-inertial (zero Taylor number) viscoelastic instability. When the Deborah number exceeds f(S) 12, as determined by a linear stability study of the inertialess flow of an Oldroyd-B fluid (using both approximate Galerkin analysis and numerical solution of the related small-gap eigenvalue issue), an overstable (oscillating) mode develops. Here, f(S) is a function of the ratio of the solvent to polymer contributions to the solution viscosity. Studies using a 1000 ppm high-molecular-weight polyisobutylene solution in a viscous solvent reveal the onset of secondary toroidal cells at a Deborah number De of 20, for of 0.14 and a Taylor number of 106, which is in perfect agreement with the theoretical value of 21. By this idea, it has been observed that the critical De grows as it declines. Long after the instability starts, the cells shrink in wavelength in comparison to those that appear in the inertial instability, which is again under our linear analysis. Similar instability has been reported to happen for this fluid in cone-and-plate flow. A velocity variation and the initial normal stress difference in the base state interact to cause these instabilities, which operate as a driving force. Many rotational shearing flows of viscoelastic fluids may experience the instabilities that we report here.

        Editor Keywords

        Viscoelastic fluids, Velocity, Polyisobutylene, Wavelength, Cells, Polymer , Toroidal cells, Ratio, Viscoelastic fluids

        Manuscript Submission information

        Manuscripts should be submitted online by registering and logging in to this link. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed.
        Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent on email address:[email protected] for announcement on this website.

        Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page.

        Participating journals:

        Journal Name

        International Journal of Composite Materials and Matrices, International Journal of Composite Materials and Matrices

        Abbrivation

        ijcmm, ijcmm

        ISSN

        2582-435X, 2582-435X

        Since

        2015

        APC

        950  $