Helmholtz's theorem(redirected from Helmholtz theorem)
Also found in: Wikipedia.
Helmholtz's theorem[′helm‚hōlt·səz ‚thir·əm]
The theorem that in the isentropic flow of a nonviscous fluid which is not subject to body forces, individual vortices always consist of the same fluid particles.
The theorem determining a general class of vector fields as being everywhere expressible as the sum of an irrotational vector with a divergence-free vector.