Devices, systems, and their methods of use, for generating droplets are provided. One or more geometric parameters of a microfluidic channel can be selected to generate droplets of a desired and predictable droplet size.

Disclosed is a composite gypsum board comprising a set gypsum core disposed between face (e.g., Manila) and back (e.g., Newsline) cover sheets. The set gypsum core is formed from a core slurry comprising stucco, water, and optional additives, such as foaming agent, migrating starch, accelerator, retarder, dispersant, etc. A dense layer formed from a dense layer slurry comprising stucco, water, fiber (e.g., paper fiber), and optionally, strength-enhancing starch, is disposed between the core and the face paper. The dense layer slurry contains a greater concentration of fiber, and optionally, strength-enhancing starch, than the core slurry, but the concentration of one or more other additives (e.g., accelerator, retarder, dispersant, or combinations thereof) is lower or the same in the dense slurry as compared with the core slurry. Also disclosed is a method of making board using one board mixer. In embodiments, paper fiber is added to water to form a suspension. The suspension is introduced, while in a non-laminar state, into the dense slurry. Further disclosed is apparatus, such as an extractor and an additive injection system, which can be a part of a cementitious slurry mixing and dispensing assembly.

A method, flow device and system for method of guiding a flow of exhaust gas for aftertreatment, including receiving exhaust gas into a mixing chamber; supporting a mixing tube mostly in the mixing chamber obliquely to and extending through a peripheral wall of the mixing chamber; supporting by a reactant doser mount a reactant doser that doses reactant to the mixing tube; receiving, by a peripheral exhaust gas entry in the mixing tube, exhaust gas at reactant stream arriving from the doser; and forming by a swirl arrangement, a rotating flow around a mixing tube output and enhancing exhaust gas flow through the mixing tube by forming some pressure around the mixing tube downstream from the peripheral exhaust gas entry.

Exemplary semiconductor processing systems may include a processing chamber, and may include a remote plasma unit coupled with the processing chamber. Exemplary systems may also include a mixing manifold coupled between the remote plasma unit and the processing chamber. The mixing manifold may be characterized by a first end and a second end opposite the first end, and may be coupled with the processing chamber at the second end. The mixing manifold may define a central channel through the mixing manifold, and may define a port along an exterior of the mixing manifold. The port may be fluidly coupled with a first trench defined within the first end of the mixing manifold. The first trench may be characterized by an inner radius at a first inner sidewall and an outer radius, and the first trench may provide fluid access to the central channel through the first inner sidewall.

An aerator for aerating a liquid as the liquid is being poured from a container includes an aerator body configured to be at least partially inserted into the container. The body includes an inlet, an outlet, and a flow control chamber disposed between the inlet and the outlet. A flow control element is movably disposed in the flow control chamber between a first position where the flow control element is spaced away from a stop and a second position where the flow control element engages the stop. The flow control chamber communicates with the outlet when the flow control element is in the second position allowing liquid to be poured from the container and allowing air to be introduced into the flow control chamber for mixing with the liquid being poured from the container to aerate the liquid being poured from the container.

An additive injection system can be a part of a cementitious slurry mixing and dispensing assembly. The additive injection system can be used to inject an additive into an auxiliary slurry discharge conduit carrying a secondary flow of cementitious slurry produced in the assembly such that the secondary slurry stream is different from a main slurry stream discharged from a main slurry discharge conduit.

The subject matter of this specification can be embodied in, among other things, a gas mixer that includes a convergent-divergent nozzle comprising a convergent portion and a divergent portion and defining a first gas flow path, an air housing comprising an air inlet configured to supply air to the first gas flow path upstream of the convergent-divergent nozzle, a gas housing defining a second gas flow path and including a first gas inlet configured to receive a secondary gas and allow the secondary gas into a second gas flow path, and a gas nozzle positioned parallel to and centrally within the first gas flow path in a convergent portion of the convergent-divergent nozzle, the gas nozzle configured to supply the secondary gas to the first gas flow path upstream of the divergent portion.

The present disclosure includes mixing apparatuses comprising a pipe having an internal channel having a convergent frustoconical portion, and a divergent portion. The divergent portion may comprise a divergent frustoconical portion and an annular, concave curved portion. A plurality of injection ports may be spaced circumferentially in the convergent frustoconical portion and communicate a liquid into internal channel. The plurality of injection ports may define an opening in the internal channel having a first dimension in a circumferential direction that is larger than a second dimension in a longitudinal direction. The injection mixer may be configured to mix a first fluid flowing through the pipe with the second fluid to form a fully homogenous, dispersed fluid mixture.

Devices, systems, and their methods of use, for generating droplets are provided. One or more geometric parameters of a microfluidic channel can be selected to generate droplets of a desired and predictable droplet size.

A method and device of preparing an emulsion comprising a first liquid and a second liquid, said method comprising the step of dispersing the first liquid into the second liquid, characterized in that the method comprises: passing the first liquid through an injection nozzle (108) for creating a spray of droplets of the first liquid, and injecting thus created droplets of first liquid into the second liquid such that Q, where Q is equal to the square of the speed of the droplets, is at least 225 m.sup.2/s.sup.2; wherein W, wherein W is sg*Q*d divided by St with sg being the specific gravity of the first liquid in kg/m.sup.3, d being the mean Sauter droplet diameter in meter of the spray leaving the injection nozzle in air, and St being the surface tension of the first liquid in Newton/meter; is at least 250 kg*m/N*s.sup.2.