1. The problem statement, all variables and given/known data The velocity in a steady helical flow of a fluid is given by: v1= -Ux2, v2=Ux1, v3=V where U and V are constant. show that divv is 0 and find the acceleration of the particle at x. Also determine the streamlines. 2. Relevant equations 3. The attempt at a solution to find the divergence, if we differentiate v1 wrt x1, we get 0, and differentiating v2 wrt x2, we get 0 and differentiating v3 wrt x3, we get 0 so the devergence is 0. but i am having problem finding the acceleration. i know the acceleration is differentiating the velocity with respect to time but what do they mean 'find the acceleration of the particle at x.' ?? Thank you.