Principles Of Chemical Mixing And Dispersion.

Objectives of mixing: To obtain a homogeneous mixture, intensify heat exchange processes, and enhance physical and chemical reactions.

Principles of mixing: Convective mixing: For immiscible components, mixing is achieved through the relative motion of different parts of the material driven by agitation.

Shear mixing: Localized mixing caused by the sliding of shear planes (formed via convection) and the resulting collision and embedding of particles along these planes.

Diffusive mixing: For miscible components, mixing occurs through the random motion of molecules (molecular diffusion) in all directions; this increases the contact area between components and shortens the mean free path of diffusion, ultimately resulting in a homogeneous distribution.