| 초록 |
The non-homogeneous flow of a thixotropic fluid around a settling sphere is explored. The thixotropy of model fluid is described by purely viscous Moore model. The conservation equations of mass and momentum coupled with the structure-kinetic equation are solved using Discontinuous Galerkin method. Depending on Weissenberg number (Wi), the flow solutions are divided into three different regimes, which could be attributed to an interplay of three competing factors: Brownian structure recovery, shear-induced structure breakdown, and refilling effect due to convection. At small Wi (1), where the Brownian structure recovery is negligible, the balance between shear-induced structure breakdown and refilling effect by convection plays a decisive role in determining flow profile. Based on the above findings, various topics have been discussed. |
