TY  - CONF
AU  - Jin, Howon
AU  - Kang, Kyongok
AU  - Ahn, Kyunghyun
AU  - Dhont, Jan K.G.
TI  - Numerical simulation on SCC (shear-rate gradient concentration coupling) Instability of colloidal spheres
M1  - FZJ-2013-02504
PY  - 2013
AB  - We present here the numerical simulation on SCC (shear-rate gradient concentration coupling) instability on colloidal sphere in both Cartesian and cylindrical geometries.   The flow instability due to coupling between shear-gradients and mass transport has been discussed through the linear stability analysis and shear-induced distortion of the pair-correlation function, which is related to shear rate dependent chemical potential [1-4].   In this poster, behaviors of concentration and shear rate profiles under various concentration, apparent shear rate and chemical potential are calculated to compare the result with the stability analysis discussed in Ref. [4]. In case of a cylindrical couette, the effect of curvature is discussed as a function of stability criterions.     References:  [1] J.K.G. Dhont,  A constitutive relation describing the shear-banding transition, Phys. Rev. E. 60, 4534, 1999.  [2] J.K.G. Dhont, W.J. Briels,  Gradient and vorticity banding, Rheo. Acta, 47, 257-281, 2008.  [3] K. Kang, M.P. Lettinga, J.K.G. Dhont,  Is vorticity-banding due to an elastic instability? , Rheo. Acta, 47, 499-508, 2008.  [4] J.K.G. Dhont, K. Kang, M.P. Lettinga, and W.J. Briels,  Shear-banding Instabilities, Korea-Austarilia Rheoilogy Journal, Vol. 22, No. 4, 2010.
T2  - International Soft Matter Conference 2013
CY  - 15 Sep 2013 - 19 Sep 2013, Rom (Italy)
Y2  - 15 Sep 2013 - 19 Sep 2013
M2  - Rom, Italy
LB  - PUB:(DE-HGF)24
UR  - https://juser.fz-juelich.de/record/134256
ER  -