Spectrally resolved velocity exchange spectroscopy of two-phase flow

Alex A. Khrapitchev*, S. Han, S. Stapf, B. Blümich

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


The Velocity EXchange SpectroscopY (VEXSY) technique, which provides a means to correlate macroscopic molecular displacements measured during two intervals separated by a variable mixing period, has been applied for the first time to a system of two-phase flow. The chemical shift difference between water and methyl protons has been exploited to simultaneously determine the probability of displacements, or propagator, of both components in a water/silicone oil mixture flowing through a glass bead pack. The joint two-time probability densities as well as the conditional probabilities of velocities show a clearly distinct dispersion behaviour of both fluids which is a consequence of the different wetting properties of the fluids with respect to the glass surface of the bead pack.

Original languageEnglish (US)
Pages (from-to)36-45
Number of pages10
JournalJournal of Magnetic Resonance
Issue number1
StatePublished - 2002


  • Chemical resolution
  • Propagator
  • Q space imaging
  • Two-phase flow

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Nuclear and High Energy Physics
  • Condensed Matter Physics


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