37 results about "Convective mixing" patented technology

A static fluid and a second fluid are placed into contact along a microfluidic free interface and allowed to mix by diffusion without convective flow across the interface. In accordance with one embodiment of the present invention, the fluids are static and initially positioned on either side of a closed valve structure in a microfluidic channel having a width that is tightly constrained in at least one dimension. The valve is then opened, and no-slip layers at the sides of the microfluidic channel suppress convective mixing between the two fluids along the resulting interface. Applications for microfluidic free interfaces in accordance with embodiments of the present invention include, but are not limited to, protein crystallization studies, protein solubility studies, determination of properties of fluidics systems, and a variety of biological assays such as diffusive immunoassays, substrate turnover assays, and competitive binding assays.

The invention develops a Hershaw box and a convection mixing experimental system composed of it. The experiment system includes a CCD camera, a vertical Hershaw box, a surface light source and the like. Vertical Hershaw box, through the rotary switch, the lower fluid space is sealed and filled with low-density fluid, and the upper fluid space is filled with high-density fluid. A CCD camera, a vertical Hershaw box, and a surface light source were placed in a dark box. The rotary switch makes the arc surface of the rotating shaft rotate to the gap between two layers of parallel light-transmitting materials to seal the fluid in the lower layer. Fill the upper part of the Hershaw box with dense fluid. When the switch is turned on, the upper and lower fluids are in contact, and the density difference of the liquid-liquid two-phase fluid causes the convective mixing experiment to start, and at the same time, the CCD camera starts to shoot and record the images of the two-phase liquid convective mixing process. The experimental system is simple, easy to operate, and accurate in timing. It is suitable for follow-up research on characteristic parameters such as phase interface changes, fingering occurrence and development time, and number of fingerings in the convective mixing process.

Multi-port electrophoresis apparatus comprising: (a) cathode chamber with inlet and outlet means defining an anolyte flow path; (b) anode chamber with inlet and outlet means defining an anolyte flow path, to generate an electric field; (c) at least one electrolyte reservoir in fluid communication with the cathode and anode chambers; (d) means adapted for communicating electrolyte between the lectrolyte reservoir and the cathode and the anode chambers; (e) at least three separation chambers adjacently disposed between the cathode and the anode chambers, the separation chambers formed by a plurality of ion-permeable barriers, adapted to impede convective mixing of contents of adjacent chambers; (f) inlet and outlet means for communicating liquid into and out of the separation chambers; (g) at least one sample reservoir, wherein each sample reservoir is connected with at least one separation chamber; and (h) means for communicating fluids between a sample reservoir and at least one separation chamber.

The invention provides a stirring system which comprises a primary stirring device, wherein the primary stirring device comprises a stirring barrel; the stirring barrel is divided into a cement feeding region, a convective mixing region and a water supply region from top to bottom in sequence in a height direction; a cement feeding opening is formed in the top of the cement feeding region; a slurry outlet is formed in the convective mixing region; a water inlet is formed in the water supply region; the water inlet is located on the side wall of the lower end of the stirring barrel; a plurality of groups of stirring fins are arranged in the stirring barrel; rotating shafts of the groups of stirring fins are coaxial; the uppermost group of stirring fins are right-handed spiral fins; the other groups of stirring fins are left-handed spiral fins; the right-handed spiral fins are located in the cement feeding region; and the left-handed spiral fins are located in the water supply region. Compared with the prior art, through the design of the right-handed spiral fins and the left-handed spiral fins in the stirring barrel, the convective mixing region is formed between the right-handed spiral fins and the left-handed spiral fins, and during a rotating process, the right-handed spiral fins accelerate sinking of cement, and the left-handed spiral fins accelerate rising of water, so that deposition of large particles is reduced and a strong convective mixing region is formed near the slurry outlet.

An improved method and apparatus for blending process materials. Preferred embodiments of the present invention are directed to a process material contacting system to increase wetted surface area for liquid contact as well as increase forced convective mixing efficiency of the liquid mixture. Use of a novel process material contacting apparatus allows one solid feeding element to serve multiple process material tanks, thus reducing overall system costs and decreasing set-up time / process variability while increasing operational efficiency. According to a preferred embodiment of the present invention, rather than adding a process material to a volume of liquid held in a blending tank, the added process material is remotely blended with the liquid outside the process material tank.

An improved method and apparatus for blending process materials. Preferred embodiments of the present invention are directed to a process material contacting system to increase wetted surface area for liquid contact as well as increase forced convective mixing efficiency of the liquid mixture. Use of a novel process material contacting apparatus allows one solid feeding element to serve multiple process material tanks, thus reducing overall system costs and decreasing set-up time / process variability while increasing operational efficiency. According to a preferred embodiment of the present invention, rather than adding a process material to a volume of liquid held in a blending tank, the added process material is remotely blended with the liquid outside the process material tank.