4 results about "Capillary wave" patented technology

The invention discloses a surface tension coordinated regulation and control high-strength dense net underwater explosion jet flow suppression protection device and a use method. A selective permeable barrier is constructed through a high-strength dense net, surface tension of an interface is used for cooperatively and selectively permeating a water phase, blocking a gas phase from passing, breaking symmetrical expansion of bubbles and inducing energy to be dissipated in a capillary wave form, and the surface tension and multi-layer array configuration are adjusted by combining real-time adjustment of mesh tension and a dense net structure; the formation of high-speed jet flow is inhibited; and collapse energy is dispersed. The limitation that traditional protection only weakens shock waves is broken through, double inhibition of bubble pulsation and jet flow can be achieved, and the device has the advantages of light weight and modular deployment and has important popularization value in military and engineering scenes such as submarines and underwater facilities.

The present invention relates to a method for calculating wind-rain-wave coupled sea surface scattering and high-resolution SAR imaging under high sea conditions. The method comprises the following steps: establishing a time-varying nonlinear rainfall sea surface geometric model under high sea conditions using white canopy coverage and a rainfall-corrected sea spectrum; solving for sea surface scattering using a rainfall-corrected dual-scale model, taking into account the corrective effect of the rainfall annular spectrum on the sea surface capillary wave spectrum; solving for the scattering and attenuation of rainfall particles in the atmosphere, as well as the coupled scattering effects of rain columns, secondary splashed seawater droplets, and foam on the sea surface at the sea-air interface using vector radiative transfer theory; and performing SAR imaging of the rain-induced sea surface under high sea conditions using a velocity spotlight imaging algorithm. Advantageously, the method utilizes vector radiative transfer theory in combination with a three-layer random particle model to provide an accurate and effective method for calculating wind-rain-wave coupled sea surface scattering and high-resolution SAR imaging under high sea conditions, with high computational speed.

The application discloses a transdermal drug delivery device, comprising: a drug container for storing a drug solution; the metal sheet is provided with a micro hole, and the micro hole is communicated with the medicine container; the piezoelectric substrate is of an annular hollow structure, the metal sheet is arranged on the piezoelectric substrate, and the metal sheet and the piezoelectric substrate form a transducer; wherein the piezoelectric substrate vibrates to generate capillary waves on the metal sheet, so that a medicine solution in the medicine container is jetted into liquid drops through the micropores, and when the liquid drops are jetted onto the skin cuticle, gas can be wrapped to form bubble cloud clusters; the bubble clouds have longitudinal pushing force for accelerating the medicine to move towards the deep layer of the skin in the vertical direction of the skin, and shock waves generated by the bubble clouds have transverse pushing force for enlarging intercellular spaces in the horizontal direction of the skin, so that the medicine penetrates through the cuticle of the skin.

The application discloses a method and device for preparing microdroplets or microcapsules by electrostatic / ultrasonic synergistic spraying, directly applying an electrostatic field to an ultrasonic nozzle which is insulated, and adopting electrostatic and ultrasonic synergistic spraying on liquid, so that the sprayed liquid is charged, and is subjected to the action of capillary waves generated by high-frequency mechanical vibration in ultrasonic atomization and the electrostatic force given by the external electrostatic field. Under the synergistic action, the liquid at the wave peak of the capillary waves can more efficiently overcome the surface tension and separate from the liquid film, so that the formation and separation of droplets are promoted, and microdroplets with small and uniform particle sizes are prepared. The microdroplets are prepared into microcapsules. The insulation treatment is to isolate the whole titanium alloy nozzle body from the piezoelectric ceramic group. The prepared microcapsules have the advantages of shell-core structure, small and uniform particle size, excellent dispersity, low impurity content, thin and dense capsule wall, high effective core liquid content and the like.