HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Oscillatory Rayleigh–Bénard Convection in elasto-viscoplastic gels

Abstract : Rayleigh-Bénard convection (RBC) is studied in an elasto-viscoplastic (EVP) gel, the widely used and studied Carbopol gel. The transition from conductive to convective regime is determined by the Schmidt-Milverton principle which leads to a critical value of the inverse of the Yield number 1∕. However, an oscillatory motion in the gel is observed below 1∕ ≈ 60 when smooth and untreated walls are used. Particles within the gel describe periodical loops close to their initial positions for 16.5 < 1∕ < 25. For larger values of 1∕ ≈ 50 < 1∕ , loops are still obtained but particles move away progressively from their initial position. The oscillations take the form of periodic traveling waves (TW). We demonstrate that elastic effects play the major role in the occurrence of oscillations.
Complete list of metadata

Cited literature [32 references]  Display  Hide  Download

Contributor : Christel Métivier Connect in order to contact the contributor
Submitted on : Monday, November 2, 2020 - 4:33:24 PM
Last modification on : Tuesday, January 4, 2022 - 6:08:19 AM


Files produced by the author(s)




Christel Metivier, Frédéric Brochard, Mohamed Darbouli, Albert Magnin. Oscillatory Rayleigh–Bénard Convection in elasto-viscoplastic gels. Journal of Non-Newtonian Fluid Mechanics, Elsevier, 2020, 286, ⟨10.1016/j.jnnfm.2020.104428⟩. ⟨hal-02986087⟩



Record views


Files downloads