Rotational nosy unimpressible ideal-fluid 86-2 Dynamic analysis of liquid micelle Known from theory mechanics, in rigid body there are two motion forms moving and rotation; but different in liquid motions Due to different velocity of each point of liquid micelle in flow field, but need keep its continuity as well, so besides moving and rotation in liquid micelle, still has deform motions. In following three motion forms of liquid micelle are analyzed Figure 6-1 is plane motion of liquid micelle. Supposing liquid micelle is rectangle ABCD at t, Through dt, it changes into new position and deforms to ' again supposing at t velocity of angle point A is ur, u Thaler progression, obtaining velocity of point B andc suy spreading due to ABCD point B B:u +-xdxu +ydx ax ax point C: u, +dy, u, +dy 77 §6-2 Dynamic analysis of liquid micelle Known from theory mechanics,in rigid body there are two motion forms： moving and rotation；but different in liquid motions.Due to different velocity of each point of liquid micelle in flow field,but need keep its continuity as well,so besides moving and rotation in liquid micelle,still has deform motions.In following three motion forms of liquid micelle are analyzed. dy y u dy u y ux C u dx x u dx u x u B u y x y y y x x   +   +   +   + point , point , ： ： Figure 6—1 is plane motion of liquid micelle.Supposing liquid micelle is rectangle ABCD at t ,Through ,it changes into new position and deforms to ,again supposing at t velocity of angle point A is ,spreading due to Thaler progression,obtaining velocity of point B and C ABCD x y u ,u dt