Effect of Surface Curvature(3) S.J.T.U. Phase Transformation and Applications Page 18/42 dA dA Phase IⅡ H-Hu=Y dm - For a spherical surface Phase I V= and A=nr2 3 Solid angle o dA 2 Figure 4.6 Movement of a dy spherical surface with finite radius of curvature. dA dA 2Y 4-4=1dm SJTU Thermodynamics of Materials Spring2008©X.J.Jimn Lecture 20 surfacePhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2008 © X. J. Jin Lecture 20 surface Page 18/42 Effect of Surface Curvature (3) dV dA V dm dA III ==− γγμμ For a spherical surface 2 3 3 rAand r V π π= = rdV dA 2 = r V dV dA V dm dA III γ γγμμ 2 ===− Phase I Phase II