The use of gas energy includes a wide range applications to directly accelerate the liquid in pipeline without aid mechanical equipment, such as marine gas-liquid jet propulsion. To clarify characteristics transfer by interphase forces for flows variable cross-section tubes, two-fluid models annular flow, bubbly flow and homogeneous were adopted, respectively, along with four newly elaborated c...

Wind energy is a typical foreseeable renewable source. This study constructs and optimizes variable cross-section cantilever-based piezoelectric harvester for low-speed wind harvesting. The Galerkin approach usually used to discretize the continuum model then get ordinary differential equations. However, this method more suitable calculating uniformity than cross-sectional beam model. To solve ...