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Title: Computer simulation of viscoelastic flow at the entry region
Authors: Loh, K.W.L.
Teoh, S.H. 
Tay, A.A.O. 
Issue Date: 1996
Citation: Loh, K.W.L.,Teoh, S.H.,Tay, A.A.O. (1996). Computer simulation of viscoelastic flow at the entry region. Polymer Engineering and Science 36 (3) : 368-377. ScholarBank@NUS Repository.
Abstract: Non-Newtonian flow has a nonlinear constitutive relationship with an advective nature. It was found that in highly advective (convective) problems, the Galerkin formulation "under-diffused," resulting in divergence at low elastic numbers. The use of the Streamline-Upwinding (SU) method improved the solution, especially when used with the Phan-Thien-Tanner (PTT) model. At the boundary discontinuity, however, the stress gradient did not necessarily flow along the streamline direction, and oscillations still remained at the corner. The Discontinuity-Capturing (DC) method resolved this problem by applying control in the direction of the stress gradient rather than the stream line direction, and a smoother solution at the corner region was achieved.
Source Title: Polymer Engineering and Science
ISSN: 00323888
Appears in Collections:Staff Publications

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