Fig. 29.4 The effectof changingsurfaceenergyon removalof (a) bakedand unbaked
deposits,showinga minimumforcesof adhesion,and (b) differentthicknessesfor tomato
pastes,showingthat the effectof the surfacedecreaseswithincreasingthickness(Liuet
al., 2005).
Improvingthe cleaning of heatexchangers 489