This paper deals with a method for generating symmetrical trapezoidal acceleration profiles the motor of vibrating system in rest-to-velocity motion. The aim was to significantly reduce time and residual load vibration lightly damped systems. Under undamped conditions, analytical values jerk are found be relation estimated natural frequency minimum value is provided, also taking into account li...

Settling velocity is an important parameter affecting the characteristics of sediment transport. Especially for cohesive in estuarine or mangrove areas, determination settling extremely complex. The study focuses on anlalyzing relationship between and concentration. Based empirical formulas Hwang (1989) experimental data Mehta Li (2003), by concentration considered with variation four parameter...

The transport of fine-grained particles in estuarine and coastal waters is influenced by flocculation processes (aggregation and floc breakup). As a consequence, the particle size varies with time in the water column, and can be orders of magnitude larger than those of primary particles. In this study the variations in floc size is simulated using a size-resolved method, which approximates the ...

Two formulas are proposed for explicitly evaluating drag coefficient and settling velocity of spherical particles, respectively, in the entire subcritical region. Comparisons with fourteen previously-developed formulas show that the present study gives the best representation of a complete set of historical data reported in the literature for Reynolds numbers up to 2×10.