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Effect of Time Steps (∆t)( As per CFL criteria the time steps should be less than ∆x/Cx/C Lfor example, for the maximum element length of λ L /10 thetime steps should be ≤ (λ L /10×C L ) that means if Signal so far obtained is not as expected Major change in the shape of signal Time steps further decreased and solution was checked forconvergenceλL∆xmax=10∆x⇒ ∆t≤C⇒ ∆tmaxL1≤10×fλL=10×CL
∆t= 10×10Case: I λ L /∆xmax= = 5−6s∆t= 5×10−6s∆t= 2.0×10−6s∆t= 1.0×10−6s∆t=0.5×10−6s∆t= 0.2×10−6s
Page 1 and 2: Presented at the COMSOL Conference
Page 3 and 4: Transient Analysis for WavePropagat
Page 5 and 6: Materials & Ultrasonic WaveProperti
Page 7 and 8: Effect of Length of Element (∆x)(
Page 9: Onward Propagating Wave for Differe
Page 13 and 14: Case: III λ L /∆xmax= = 12∆t=
Page 15 and 16: Effect of Excitation on Line and Po
Page 17 and 18: Time and Frequency Domain Signal fo
Page 19 and 20: Simulation Results for λ L /∆x m
Page 21 and 22: Simulation Results for λ L /∆x m
Page 24: E-mail:ghose.bikash@hemrl.drdo.in ,

Two Dimensional FEM Simulation of Ultrasonic ... - COMSOL.com

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