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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 11 (1989), S. 717-726 
    ISSN: 0392-6737
    Keywords: Hydrodynamic stability ; Convection and heat transfer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si dà una descrizione, in termini di un approccio di unoscillatore armonico, di moti in oscillazione crescente, per spinta idrostatica, cioè l'insorgenza di convezione oscillatoria in uno strato di fluido soggetto a vari vincoli termici e meccanici. Quando lo smorzamento si annulla, si definiscono i valori di soglia. Si sottolinea anche che l'oscillazione crescente è una conseguenza dell'accoppiamento sincrono delle forze che agiscono nel sistema.
    Abstract: Резюме В приближении гармонического осциллятора предлагается описание гидростатических устойчивых движений, т.е. возникновение осциияторной конвенции в слое жидкости, на который наложены различные тепловые и механические ограничения. При исчезающе малом затухании мы определяем пороговые значения. Мы также отмечаем, что устойчивость является следствием синхронной связи сил, действующих в системе.
    Notes: Summary A description of buoyancy-driven overstable motions,i.e. the onset of oscillatory convection in a fluid layer subjected to various thermal and mechanical constraints is given in terms of aharmonic-oscillator approach. At vanishing damping we define the threshold values. We also point out that overstability is a consequence of thesynchronous coupling of the forces acting in the system.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 11 (1989), S. 1057-1062 
    ISSN: 0392-6737
    Keywords: Hydrodynamic stability ; PACS 47.25.Qv ; Convection and heat transfer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si danno nuove previsioni teoriche che riguardano la sovrastabilità di fluidi viscoelastici nei termini del numero di Prandtl e del rapporto tra il rilassamento viscoelastico e i tempi di diffusione termica.
    Abstract: Резюме Предлагаются новые теоретические предсказания, касающиеся устойчивости упруговязких жидкостей. Предложенный подход основан на числе Прандтля и отношении времени упруговязкой релаксации к времени термодиффузии.
    Notes: Summary New theoretical predictions concerning overstability of viscoelastic fluids are given in terms of the Prandtl number and the ratio of viscoelastic relaxation to thermal diffusion times.
    Type of Medium: Electronic Resource
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