Classes of Hydrodynamic and Magnetohydrodynamic Turbulent Decay
2017 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 118, no 5, 055102Article in journal (Refereed) Published
We perform numerical simulations of decaying hydrodynamic and magnetohydrodynamic turbulence. We classify our time-dependent solutions by their evolutionary tracks in parametric plots between instantaneous scaling exponents. We find distinct classes of solutions evolving along specific trajectories toward points on a line of self-similar solutions. These trajectories are determined by the underlying physics governing individual cases, while the infrared slope of the initial conditions plays only a limited role. In the helical case, even for a scale-invariant initial spectrum (inversely proportional to wave number k), the solution evolves along the same trajectory as for a Batchelor spectrum (proportional to k(4)).
Place, publisher, year, edition, pages
American Physical Society, 2017. Vol. 118, no 5, 055102
IdentifiersURN: urn:nbn:se:kth:diva-204089DOI: 10.1103/PhysRevLett.118.055102ISI: 000396415600007PubMedID: 28211738ScopusID: 2-s2.0-85012875829OAI: oai:DiVA.org:kth-204089DiVA: diva2:1085427
QC 201703292017-03-292017-03-292017-03-29Bibliographically approved