Hi
I want to inject ac current (amplitude is fixed) to a silicon beam and hope to see maximum expansion when the ac frequency is at half of the mechanical resonant frequency of the beam. I tried using "Joule heating and thermal expansion" physics and frequency domain solver in Comsol 4.2 but the result is the same to the case where no current is applied. Reasonable result can be obtained when using stationary solver. Does anyone know how to solve this? Thanks.
I want to inject ac current (amplitude is fixed) to a silicon beam and hope to see maximum expansion when the ac frequency is at half of the mechanical resonant frequency of the beam. I tried using "Joule heating and thermal expansion" physics and frequency domain solver in Comsol 4.2 but the result is the same to the case where no current is applied. Reasonable result can be obtained when using stationary solver. Does anyone know how to solve this? Thanks.