caa a22 4500 46906658X CHVBK 20180323132910.0 cr unu---uuuuu 170328e19921101xx s 000 0 eng 10.1007/BF02726099 doi (NATIONALLICENCE)springer-10.1007/BF02726099 On energy propagation for internal waves in dissipative fluids [Elektronische Daten] [F. Mainardi, D. Tocci, F. Tampieri] Summary: In the present note we investigate the classical concept of energy velocity for internal gravity waves in fluids taking into account the effect of dissipation. Assuming the linear Boussinesq approximation in a fluid characterized by a constant Brunt-Väisälä frequency, we introduce the dissipative parameters (viscosity and thermal conductivity), and we compare the energy velocity with the kinematic velocities (group and phase velocity). The effect of dissipation turns out to be overwhelming in a narrow wavelength band around the short wave cut-off, where the group velocity exhibits an anomalous behaviour and cannot be identified with the energy velocity. Società Italiana di Fisica, 1992 03.40.Kf nationallicence Waves and wave propagation: general mathematical aspects nationallicence 47.35 nationallicence Hydrodynamic waves nationallicence 92.60.Dj nationallicence Gravity waves nationallicence tides nationallicence and compressional waves nationallicence Mainardi F. Dipartimento di Fisica dell'Università, Bologna, Italia aut Tocci D. Dipartimento di Fisica dell'Università, Bologna, Italia aut Tampieri F. Istituto FISBAT del CNR, Bologna, Italia aut Il Nuovo Cimento B (1971-1996) Società Italiana di Fisica 107/11(1992-11-01), 1337-1342 107:11<1337 1992 107 40764 https://doi.org/10.1007/BF02726099 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02726099 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mainardi F. Dipartimento di Fisica dell'Università, Bologna, Italia aut NATIONALLICENCE 700 1- Tocci D. Dipartimento di Fisica dell'Università, Bologna, Italia aut NATIONALLICENCE 700 1- Tampieri F. Istituto FISBAT del CNR, Bologna, Italia aut NATIONALLICENCE 773 0- Il Nuovo Cimento B (1971-1996) Società Italiana di Fisica 107/11(1992-11-01), 1337-1342 107:11<1337 1992 107 40764 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer