While doing some research on power acoustics, stumbled upon a curiosity that is quite interesting. George CONSTANTINESCO who was a genius inventor in the beginning of nineteen hundreds has invented an automatic continuously variable gearless transmission, which was publicly demonstrated in one...
I am studying the acoustic wave attenuation in thin tubes. One of the classic papers that discuss the subject is “On the propagation of sound waves in cylindrical tubes” by H. Tijdeman. It contains all the formulas and tables needed to calculate the attenuation in thin tubes filled with air...
I am looking for a solution that would limit the transmitted sound intensity/power in a passive way. There actually already exists such natural limiter caused by the nonlinear sound propagation at high intensities in waveguides. But the required intensity to reach that limit is very high.
I...
Robert Carr has patented his idea about internal wings in 1986 (US Patent # 4,568,042; and US Patent 4,579,300) which can be found on the page http://www.rexresearch.com/carrcoan/carrcoan.htm .
The man is obviously not an expert of fluid dynamics, but his idea is still interesting. There is a...
Hi Experts,
I am trying to run a trivially simple simulation, a ball moving within a cone.
If I don't add a 3D Contact - Force Joint between the ball and cone wall then the ball will fly through the wall.
If I add the Force Joint then I get the following error message:
"Joint force error: No...
