Finite amplitude wave propagation through bubbly fluids

Ohl, Siew-Wan (avtor), Rosselló, Juan Manuel (avtor), Fuster, Daniel (avtor), Ohl, Claus-Dieter (avtor)

The existence of only a few bubbles could drastically reduce the acoustic wave speed in a liquid. Wood’s equation models the linear sound speed, while the speed of an ideal shock waves is derived as a function of the pressure ratio across the shock. The common finite amplitude waves lie, however, in between these limits. We show that in a bubbly medium, the high frequency components of finite amplitude waves are attenuated and dissipate quickly, but a low frequency part remains. This wave is then transmitted by the collapse of the bubbles and its speed decreases with increasing void fraction. We demonstrate that the linear and the shock wave regimes can be smoothly connected through a Mach number based on the collapse velocity of the bubbles.

• Jezik: Angleški jezik
• Ključne besede: bubbly fluid, wave speed, shock wave, direct numerical simulation, gelatin gel, high speed photography
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: 9 str.
• Številčenje: Vol. 176, art. 104826
• PID: 20.500.12556/RUL-156073
• UDK: 532.528
• ISSN pri članku: 1879-3533
• DOI: 10.1016/j.ijmultiphaseflow.2024.104826
• COBISS.SI-ID: 194638339
• Datum objave v RUL: 07.05.2024

Gradivo je del revije

• Naslov: International journal of multiphase flow
• Skrajšan naslov: Int. j. multiph. flow
• Založnik: Elsevier
• ISSN: 1879-3533
• COBISS.SI-ID: 23219973

Licence

• Licenca: CC BY-NC 4.0, Creative Commons Priznanje avtorstva-Nekomercialno 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc/4.0/deed.sl
• Opis: Licenca Creative Commons, ki prepoveduje komercialno uporabo, vendar uporabniki ne rabijo upravljati materialnih avtorskih pravic na izpeljanih delih z enako licenco.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: mehurčkasti fluid, hitrost toka, direktna numerična simulacija, želatina, visokohitrostna fotografija