A Lagrangian form for the T – Ω formulation Gérard Vinsard, Stéphane Dufour and Esteban Saatdjian Eur. Phys. J. Appl. Phys., 73 3 (2016) 30902 Published online: 22 March 2016 DOI: 10.1051/epjap/2016150373