title: NMR acceleration mapping in percolation model objects.
abstract: An NMR microscopy technique is described that permits direct mapping of local accelerations. The method is tested with water flow through a random site percolation model object and compared with computational fluid dynamics simulations. A general formalism, the "polygon rule," is reported for the design of gradient pulse sequences for phase encoding of higher order motions, or, in other words, for compensation of phase shifts by lower motional orders.
authors.affiliation: Sektion Kernresonanzspektroskopie, Universität Ulm, 89069 Ulm, Germany.
authors.forename: Bogdan
authors.initials: B
authors.lastname: Buhai
authors.forename: Aidar
authors.initials: A
authors.lastname: Hakimov
authors.forename: Ioan
authors.initials: I
authors.lastname: Ardelean
authors.forename: Rainer
authors.initials: R
authors.lastname: Kimmich