Is there a Young-Laplace equation for solids and gases?

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In summary, the conversation is about whether there is an equation similar to the Young-Laplace equation that relates pressure difference to the shape of a solid-gas interface. The speaker clarifies that they meant solid-solid interfaces, which are more complex due to the regular crystalline structure of true solids. They also mention the need to consider surface energy in thermodynamics when discussing polyphase solids.
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I was wondering, is there any equation -like young laplace equation - that relates the pressure difference to the shape of the surface on elastic solids? (interfase: solid - gas)
 
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I meant, solid-solid. Like on a mosaic
 
  • #3
Well solid - solid interfaces are more complicated.

Don't forget that true solids have a regular crystalline structure so are constrained to their particular crystal shape. They are not so readily deformable as fluids by boundary pressure forces. Their boundaries don't just follow the interplay of pressure forces between two fluids.

In thermodynamics when discussing polyphase solids such as alloys you have to add an extra term into the First Law for to allow for the surface energy of the grain boundaries.

Perhaps more detail about what you are looking for?
 

Related to Is there a Young-Laplace equation for solids and gases?

1. What is the Young-Laplace equation for solids?

The Young-Laplace equation for solids is a mathematical expression used to describe the equilibrium of a solid surface under the influence of surface tension. It states that the difference in pressure between two points on a curved solid surface is equal to the surface tension divided by the radius of curvature at that point.

2. What is the significance of the Young-Laplace equation in materials science?

The Young-Laplace equation is significant in materials science because it helps us understand the behavior of solid surfaces at the microscopic level, which is crucial in designing and developing new materials. It is also useful in predicting the stability and mechanical properties of thin films and nanoparticles.

3. How is the Young-Laplace equation derived?

The Young-Laplace equation is derived from the principle of energy minimization. It is based on the fact that a liquid surface will always try to minimize its energy by forming a shape with the minimum surface area. This leads to the equilibrium of a curved solid surface, which is described by the Young-Laplace equation.

4. What are some practical applications of the Young-Laplace equation for solids?

The Young-Laplace equation has numerous practical applications in various fields such as materials science, engineering, and biology. It is used to explain the behavior of liquid droplets on solid surfaces, the formation of bubbles and capillaries, and the stability of thin films. It is also applied in the design of microfluidic devices and in the study of cell membranes.

5. Are there any limitations to the Young-Laplace equation for solids?

Yes, there are some limitations to the Young-Laplace equation for solids. It assumes that the solid surface is perfectly smooth and homogeneous, which is not always the case in real-world scenarios. It also neglects the effects of gravity and other external forces, which can have a significant impact on the behavior of solid surfaces. Additionally, the equation is limited to small deformations and cannot accurately predict the behavior of highly curved surfaces or surfaces with sharp edges.

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