Effect of shear on phase-ordering dynamics with order-parameter-dependent mobility: The large-n limit

The effect of shear on the ordering kinetics of a conserved order-parameter system with O(n) symmetry and order-parameter-dependent mobility Gamma(<(p hi)over right arrow>) proportional to (1-<(phi)over right arrow>(2)/n)(alph a) is studied analytically within the large-n limit. In the late stage, the structure factor becomes anisotropic and exhibits multiscaling behavior wi th characteristic length scales (t(2a+5)/ln t)(1/2(alpha+2)) in the flow di rection and (t/ln t)(1/2(alpha+2)) in directions perpendicular to the flow. As in the alpha=0 case, the structure factor in the shear-flow plane has t wo parallel ridges.