Fluid mechanics

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In fox mcdonald - 6th edition page 83...i read that the free surface profile is independent of any property of liquid. But i have doubt that any liquid tried to acquire a shape so as to minimize its energy.
So what went wrong?
 

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Andy Resnick
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I don't have that book, but the free surface profile- the local curvature- is set by the pressure jump across the surface and the interfacial energy (Laplace equation). I suppose one could argue that neither is a property of the bulk fluid, but the interfacial energy is dependent on both materials.
 

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