Comparison of sonoluminescence in Water and Sulfuric Acid Kh. Imani, M. Silatani, R. Rezaei - Nasirabad, A. Moshaii, R. Sadighi - Bonabi,

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Presentation transcript:

Comparison of sonoluminescence in Water and Sulfuric Acid Kh. Imani, M. Silatani, R. Rezaei - Nasirabad, A. Moshaii, R. Sadighi - Bonabi,

History: 1934(MBSL) 1934 Bath Ultrasound by H. Frenzel &H. Schultes(MBSL) 1989(SBSL) 1989 F. Gaitan (SBSL) 2005( H2SO4) 2005 F. Flannigan & S. Suslick ( H2SO4)

: Applications: Sonochemistiy Sonofusion Sonodynamic therapy

Physical and SL properties of some liquids:

Why sulfuric acid ? Higher intensity Appearance of line emission in spectrum

Hydrodynamics model: Bubble dynamics: boundary condition of pressure and Van der waals equation of gas:

Chemical reaction:

14/17 Mass transfer at the bubble wall: The bubble contents is assumed to be: ( Nobel gas+H 2 O+ Reaction products )

Heat transfer at the bubble wall: Conductivity coefficient Heat Conduction :

Instability conditions of bubble: Shape Instability (Sh-S) Diffusion Instability (D-S) Bjerknes Instability (Bj.thr.)

Physical properties :

Simulation Results:

With regard to computed phase diagrams, we chose the junction point (Pa, R0) of D-S curve with other stability curves

Evolution of radius versus time in one cycle :

Total Number of Particles:

Number of H 2 O:

Number of H 2 SO 4 :

Temperature:

Calculation Experimental A. A.Troia, et. al, Ultrasonic sonochemistry—13(2006-)278