Electroneutrality energy density

When electrons enter a solid lattice, they occupy certain energy levels arranged in well-defined zones. What this means is that there is an energy zone within the crystal where the electron wave density is high, and a resonance condition has arisen. The electrons are free to move within this zone and electroneutrality is preserved because the electron wave... 

The mean-field approach combined with the local electroneutrality approximation (LEA) can be extended beyond the boxlike model. To calculate the free energy of a micellar corona with the radial gradients in polymer density, we assume that all the free ends of blocks A are located at the corona periphery and are equally stretched. Within this model, the free energy of a micelle of morphology i (t = 1,2,3), can be explicitly calculated for both quenched and annealing PE coronae. We outline here only a general scheme of the approach, whereas the details can be found in [22, 32]. 

If electroneutrality is assumed, the fluid mechanical conservation equations of mass, momentum, and energy remain unchanged. But if electroneutrality is not assumed with a net charge density of the liquid, the mass conservation equation remains unchanged, but the Lorentz body force must be added to the right-hand side of the Navier-Stokes (N-S) equation. 

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