## 8.3. Interaction of Particles with Adhesion

### 8.3.1. Interaction Between Adhesive Rigid SpheresâHamaker Theory

When two particles approach each other, interparticle attraction can result due to the van der Waals potential between the molecules of the two bodies. As a result, particles can adhere to each other, especially for fine particles, i.e., less than 100Â Î¼m. As discussed in detail in Seville etÂ al. (1997), the van der Waals attractive potential for two molecules in vacuum can be given as

$W(r)=âCr6$

(8.90)

Using pair-wise addition, Hamaker (1937) analyzed the adhesive force between two rigid spherical particles at a separation distance s

Get Particle Technology and Engineering now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.