A fluidic component for generating an ultrasound signal is provided. The fluidic component includes a flow chamber, which can be flowed through by a fluid flow, which enters the flow chamber through an inlet opening of the flow chamber and exits from the flow chamber through an outlet opening of the flow chamber. The fluidic component has at least one device for forming an oscillation of the fluid flow at the outlet opening, the oscillation taking place in an oscillation plane, a separation device, which is designed to separate off a part from the oscillating fluid flow. The separation device includes an inlet opening, through which the oscillating fluid flow enters the separation device, and at least one first outlet opening and at least one second outlet opening, through each of which a part of the oscillating fluid flow exits.

The present invention generally relates to systems and techniques for manipulating fluids and/or making droplets. In certain aspects, the present invention generally relates to droplet production. The droplets may be formed from fluids from different sources. In one set of embodiments, the present invention is directed to a microfluidic device comprising a plurality of droplet-making units, and/or other fluidic units, which may be substantially identical in some cases. Substantially each of the fluidic units may be in fluidic communication with a different source of a first fluid and a common source of a second fluid, in certain embodiments. In one aspect, substantially the same pressure may be applied to substantially all of the different sources of fluid, which may be used to cause fluid to move from the different sources into the microfluidic device. In some cases, the fluids may interact within the fluidic units, e.g., by reacting, or for the production of droplets within the microfluidic device. In some cases, the droplets may be used, for example, to form a library of droplets.

The present invention generally relates to systems and techniques for manipulating fluids and/or making droplets. In certain aspects, the present invention generally relates to droplet production. The droplets may be formed from fluids from different sources. In one set of embodiments, the present invention is directed to a microfluidic device comprising a plurality of droplet-making units, and/or other fluidic units, which may be substantially identical in some cases. Substantially each of the fluidic units may be in fluidic communication with a different source of a first fluid and a common source of a second fluid, in certain embodiments. In one aspect, substantially the same pressure may be applied to substantially all of the different sources of fluid, which may be used to cause fluid to move from the different sources into the microfluidic device. In some cases, the fluids may interact within the fluidic units, e.g., by reacting, or for the production of droplets within the microfluidic device. In some cases, the droplets may be used, for example, to form a library of droplets.

Various implementations include a fluidic oscillator array including at least two fluidic oscillators, each including an interaction chamber, fluid supply inlet, outlet nozzle, and feedback channels. The interaction chambers have a first and second attachment wall. Fluid streams flow from the fluid supply inlets, into the interaction chambers, and exit through the outlet nozzles. A feedback channel is coupled to each of the first and second attachment walls. Each feedback channel is in fluid communication with the interaction chamber and has an intermediate portion disposed between a first and second end of the feedback channels. Fluid from the fluid stream flows into the first ends of the respective feedback channels, causing the fluid stream to oscillate between the first and second attachment walls. Adjacent feedback channels of adjacent fluidic oscillators share a common intermediate portion, causing the exiting fluid streams of each fluidic oscillator to oscillate at the same frequency.

A fluidic component for generating an ultrasound signal is provided. The fluidic component includes a flow chamber, which can be flowed through by a fluid flow, which enters the flow chamber through an inlet opening of the flow chamber and exits from the flow chamber through an outlet opening of the flow chamber. The fluidic component has at least one device for forming an oscillation of the fluid flow at the outlet opening, the oscillation taking place in an oscillation plane, a separation device, which is designed to separate off a part from the oscillating fluid flow. The separation device includes an inlet opening, through which the oscillating fluid flow enters the separation device, and at least one first outlet opening and at least one second outlet opening, through each of which a part of the oscillating fluid flow exits.

A structural component for a vehicle has a surface with a riblet structure. The riblet structure includes a plurality of grooves, including a first groove having a first longitudinal section forming a first angle with a main longitudinal direction of the structural component. The first angle is larger than 0 and the main longitudinal direction corresponds to a flow direction of a fluid along the surface of the structural component.

Various implementations include a fluidic oscillator array including at least two fluidic oscillators, each including an interaction chamber, fluid supply inlet, outlet nozzle, and feedback channels. The interaction chambers have a first and second attachment wall. Fluid streams flow from the fluid supply inlets, into the interaction chambers, and exit through the outlet nozzles. A feedback channel is coupled to each of the first and second attachment walls. Each feedback channel is in fluid communication with the interaction chamber and has an intermediate portion disposed between a first and second end of the feedback channels. Fluid from the fluid stream flows into the first ends of the respective feedback channels, causing the fluid stream to oscillate between the first and second attachment walls. Adjacent feedback channels of adjacent fluidic oscillators share a common intermediate portion, causing the exiting fluid streams of each fluidic oscillator to oscillate at the same frequency.

A fluid manifold includes an elongated hollow body forming an inner area, having: a first end extending to a second end; and a top surface and a bottom surface; a cylindrical conduit having a length that extends through the inner area, the cylindrical conduit forming a channel that is fluidly separable from the inner area of the elongated hollow body, the cylindrical conduit extending through the first end of the elongated hollow body; a plurality of exit ports in fluid communication with the inner area and extending at a perpendicular angle relative to the cylindrical conduit; a mounting plate secured to the plurality of exit ports; a first row of a plurality of cutouts extending through the thickness of the elongated body, the first row of the plurality of cutouts providing fluid passage between the channel of the cylindrical conduit and the inner area of the elongated body; and a second row of a plurality of cutouts extending through the thickness of the elongated body, the second row of the plurality of cutouts providing fluid passage between the channel of the cylindrical conduit and the inner area of the elongated body.

Plastic microfluidic structures having a substantially rigid diaphragm that actuates between a relaxed state wherein the diaphragm sits against the surface of a substrate and an actuated state wherein the diaphragm is moved away from the substrate. As will be seen from the following description, the microfluidic structures formed with this diaphragm provide easy to manufacture and robust systems, as well readily made components such as valves and pumps.

Plastic microfluidic structures having a substantially rigid diaphragm that actuates between a relaxed state wherein the diaphragm sits against the surface of a substrate and an actuated state wherein the diaphragm is moved away from the substrate. As will be seen from the following description, the microfluidic structures formed with this diaphragm provide easy to manufacture and robust systems, as well readily made components such as valves and pumps.