ORALS

SESSION: MathematicsWedPM3-R9	6th Intl. Symp. on Sustainable Mathematics Applications
Wed. 29 Nov. 2023 / Room: Showroom
Session Chairs: Ruggero Maria Santilli; Mike Mikalajunas; Session Monitor: TBA

17:55: [MathematicsWedPM313] OS
NUMERICAL SIMULATION OF BLAST WAVE IN SHOCK TUBE
Ang-Yang Yu¹ ; ¹Heilongjiang Vocational College of Biology Science and Technology, Heilongjiang, China;
Paper Id: 377 [Abstract]

In my own work, the motion and negative pressure pulse of blast wave in the shock tube are simulated numerically. Based on the formation mechanism of blast wave, the initial operational condition of blast wave is given. A nice hologram is obtained by means of computational fluid imaging, which is useful to make comparision between the numerical results and experimental data. It is found that the negative pressure region is formed after the coefficient wave behind blast wave caught up with the wave head of shock wave. Isodense curve with oval shape is formed due to the influence of nozzle. Numerical results can reflect the operational process of blast wave very well. To this end, a further understanding of the operation and negative pressure phenomenon of blast wave can be obtained, which provides valuable hints for engineering applications.

SESSION: MathematicsWedPM3-R9	6th Intl. Symp. on Sustainable Mathematics Applications
Wed. 29 Nov. 2023 / Room: Showroom
Session Chairs: Ruggero Maria Santilli; Mike Mikalajunas; Session Monitor: TBA

18:20: [MathematicsWedPM314] OS
NUMERICAL SIMULATION OF SEISMIC WAVE FIELD IN THE TWO-PHASE VISCOELASTIC EDA MEDIA
Ang-Yang Yu¹ ; ¹Heilongjiang Vocational College of Biology Science and Technology, Heilongjiang, China;
Paper Id: 449 [Abstract]

In the present work, wave function formula of two-phase viscoelastic EDA media is established. Then, elastic parameters of two-phase viscoelastic EDA media is obtained. Moreover, wave field simulation of two-phase viscoelastic EDA media is carried out by means of pseudo-spectra method. Apart from fast longitudinal wave and transverse wave, there is also slow longitudinal wave, which can be observed in two-phase viscoelastic EDA media. The amplitude of slow longitudinal wave is larger than those in fast longitudinal wave and transverse wave in the fluid phase whereas it is the opposite case in the solid phase. It can be observed that anisotropy of media makes the wavefront of longitudinal wave and transverse wave deviate from the circle shape in isotropic media. The wavefront shape of transverse wave is more complex than hat of longitudinal wave. In addition, there exists wavefront cusp phenomenon. Viscoelasticity of media can cause the drop of seismic wave amplitude. It can be concluded that two-phase viscoelastic EDA media can reflect multiphase, viscoelasticity and anisotropy fairly well. This work will have great significance for investigating fractured reservoirs