Embodiments include microfluidic devices and related methods. A microfluidic device for producing microbubbles may include a first microfluidic channel for supplying a continuous phase fluid, the first microfluidic channel including a convergent section and a constant-width section downstream from the convergent section, wherein the constant-width section discharges into a junction; a second microfluidic channel for supplying a dispersed phase fluid, the second microfluidic channel including an orthogonal section oriented orthogonal to the constant-width section, wherein the orthogonal section discharges into the junction; and a third microfluidic channel for conveying produced microbubbles, the third microfluidic channel including a divergent section, wherein the junction discharges into the divergent section.

A system for separating solids from a fluid mixture includes a vessel including a first chamber to receive a solid-laden fluid mixture, and a second chamber to receive liquids separated from the solid-laden fluid mixture. In certain aspects, at least one eductor is disposed in the first chamber to flow the solid-laden fluid mixture out of the first chamber. In certain aspects, an auger is disposed in the first chamber to move at least solids of the solid-laden fluid mixture out of the first chamber.

A system for creating an oxidation reduction potential (ORP) in water employs a plurality of ozone supply units housed in separate enclosures. The ozone supply units feed into a manifold that contains a plurality of fluid paths and has one or more ozone intake ports. The ozone intake ports are fluidically coupled to one or more ozone output ports of each ozone supply unit. The manifold includes a plurality of flow switches configured to transmit control signals to one or more controllers of each ozone supply unit in response to sensing a flow of water through the fluid paths in order to cause the ozone supply units to generate ozone. The manifold also includes a plurality of fluid mixers that are fluidically coupled to the ozone intake ports and configured to introduce the ozone generated by the ozone supply units into the water flowing through the fluid paths.

A polymer dispersion system for use in a hydraulic fracturing operation is disclosed. The system comprises (a) a tank assembly comprising an ingress, an egress, and an interior volume for collecting mother solution; (b) a first transfer pump coupled with the egress of the tank assembly: and (c) a second transfer pump coupled with the egress of the tank assembly. The first transfer pump is configured for coupling to a missile unit and a blender unit downstream thereof, but in fluid communication with only one of such units at any given time when coupled. A method of operating said polymer dispersion system is also disclosed.

An insert device includes a first coupling body inserted into an engine cylinder head. The first coupling body extends around a center axis to define a first interior volume of the first coupling body that is shaped to receive a distal tip of a fuel injector. The insert device includes a second mixing body coupled with the first coupling body and extending around the center axis. The second mixing body includes conduits that receive fuel from the fuel injector and air from a combustion chamber, combine the fuel with the air, and direct the fuel-air mixture into the combustion chamber. The first coupling body has a first end surface positioned to face the cylinder head and the first coupling body is tapered such that an outer diameter of the first coupling body is larger toward the first end surface than toward the second mixing body.

An aerosol-generating system is provided, including an air inlet and an air outlet; a liquid storage portion having a liquid outlet and being configured to hold a liquid aerosol-forming substrate; an air flow passage from the air inlet to the air outlet past the liquid outlet, wherein the air flow passage is shaped such that there is a pressure drop within the air flow passage at the liquid outlet when air flows from the air inlet to the air outlet through the air flow passage; and a heating element disposed within the air flow passage between the liquid outlet and the air outlet. There is also provide a cartridge for an aerosol-generating system and a method of generating aerosol from a liquid aerosol-forming substrate.

An aerosol-generating system is provided, including an air inlet and an air outlet; a liquid storage portion having a liquid outlet and being configured to hold a liquid aerosol-forming substrate; an air flow passage from the air inlet to the air outlet past the liquid outlet, wherein the air flow passage is shaped such that there is a pressure drop within the air flow passage at the liquid outlet when air flows from the air inlet to the air outlet through the air flow passage; and a heating element disposed within the air flow passage between the liquid outlet and the air outlet. There is also provide a cartridge for an aerosol-generating system and a method of generating aerosol from a liquid aerosol-forming substrate.

Devices suitable for use in an advanced oxidation method for organic and inorganic pollutants deploying OH* radicals and ozone is disclosed. Optionally, a first discharge device, providing OH* radicals and second discharge device providing ozone, are combined to provide desirable chemical and biocidal characteristics. Further, efficient mixing systems for transferring the radicals to the target fluid are disclosed.

A bubble generating device includes a casing unit, a gas intake unit and a liquid input unit. The casing unit includes a flow passage converging from a first casing end towards a second casing end. The gas intake unit includes a mounting part mounted to the first casing end, a protrusion projecting and tapering from the mounting part into the flow passage, and a gas channel extending through the mounting part and protrusion and communicates with the flow passage. The liquid input unit includes a liquid channel communicating with the flow passage and defines an axis nonparallel to and radially offset from an axis of the flow passage.

A microbubble generator and a laundry treating device. The microbubble generator includes: an air dissolving tank, having an air dissolving cavity defined therein, and an inlet and an outlet configured to allow water to flow in and out, the inlet being located above the outlet; a baffle, provided in the air dissolving tank, at least partially located between the inlet and the outlet in a horizontal direction, and provided with a gap and/or a through hole; and a cavitator, provided outside the air dissolving tank and connected with the outlet, or provided at the outlet.