228 results about "Capillary number" patented technology

An apparatus and method for determining the density and fluid-type of a fluid flowing in a capillary tube, the velocity and viscosity of a blood sample flowing in a capillary tube, the erythrocyte sedimentation rate (ESR) of a blood sample after flow has been brought to an abrupt stop in a capillary tube, and/or the zeta sedimentation rate (ZSR) of a blood sample after flow has been brought to an abrupt stop in a capillary tube. These measurements are accomplished by directing a waveform pulse, such as an ultrasound pulse, at a pre-determined frequency transversely across the capillary tube and sample fluid, and by determining the flight of time of the pulse through the capillary tube and sample fluid and/or the Doppler shift of the echo signals reflecting off cells moving forwardly or transversely within a flowing, or stationary, blood sample.

The present invention relates to a method for the displacement of an analyte fluid within a capillary microchannel and to a microfluidic system. In particular, it relates to the field of microfluidics, and especially to microfluidic systems. The method comprises steps which consist in introducing at least one ferrofluid train (3) into the said capillary channel (1), the said ferrofluid train (3) comprising a slug of ferrofluid (5) and, placed against at least one of the two ends of the slug of ferrofluid and in contact with it, a slug of liquid (7) immiscible with both the ferrofluid and the analyte fluid; in introducing the said analyte fluid (9) into the said capillary channel, in proximity to the ferrofluid train and on the side having the slug of liquid (7) immiscible with both the ferrofluid and the analyte fluid; and in controlling the analyte fluid displacement within the said capillary channel by the action of a magnetic field on the ferrofluid train, which field is generated by a magnet system placed on the outside of the said capillary channel.

A method of forming an aqueous treatment liquor comprising a benefit agent, the method comprising the steps of: (a) providing a consumer product comprising: (i) a porous dissolvable solid structure, and (ii) a hydrophobic coating comprising a benefit agent, the hydrophobic coating applied to the porous dissolvable solid structure; (b) providing an aqueous solution; and (c) dissolving the consumer product in the aqueous solution to form an aqueous treatment liquor comprising a hydrophobic portion and an aqueous portion. The method provides a Capillary Number of less than about 1000.

The invention discloses a precise machining method for a capillary tube for a biodegradable magnesium alloy intravascular stent. The method comprises the following steps of: step 1, performing stress relief annealing and machining on a magnesium alloy extrusion bar to obtain a tube blank; step 2, extruding the tube blank to obtain a seamless extrusion tube blank, and performing stress relief annealing; step 3, performing multi-pass rolling and annealing on the annealed seamless extrusion tube blank to obtain a thin tube blank; and step 4, performing multi-pass drawing and annealing on the thin tube blank to obtain the capillary tube for the biodegradable magnesium alloy intravascular stent. The capillary tube produced by the method disclosed by the invention is accurate in dimension (a wall thickness error is not greater than 5%), can be more than 1 metre long, is high in surface quality, uniform in matrix structure, excellent in mechanical property, low in machining cost and high in machining efficiency, and can be subjected to industrialized batch production.

A pipette for delivering a measured volume of liquid having an elongated hollow tubular body (or capillary tube) (2) configured to draw liquid by capillary action, the hollow tubular body having a lower open end and an upper open end; and a chamber (3) structurally connected to the upper end of the tubular body (2), the chamber having an orifice (4) in the upper portion of the chamber.

A method, a system and a program storage device for predicting a property of a fluid, such as fluid production from a subterranean reservoir containing heavy oil entrained with gas is described. The method includes developing a baseline correlation of gas relative permeability k_rg versus gas saturation S_g. A capillary number dependent correlation is determined capturing the relationship between at least one of critical gas saturation S_gc and capillary number N_ca and gas relative permeability k_rgro and capillary number N_ca phased upon a plurality of depletion rates. Capillary numbers N_c are calculated for a plurality of cells in a reservoir model representative of the subterranean reservoir. The baseline correlation is then adjusted to comport with at least one of S_gc and k_rgro selected from the capillary number dependent correlation to produce a plurality of corresponding adjusted baseline, correlations. Gas relative permeabilities k_rg for the plurality of cells are selected from the corresponding adjusted baseline correlations. A reservoir simulation is then run utilizing the selected relative permeabilities k_rg to predict a property of at least one fluid in a subterranean reservoir containing heavy oil entrained with gas.

The invention discloses an electronic cigarette atomizer, which comprises an oil bin, a capillary tube and a suction nozzle. The oil inlet end of the capillary tube is communicated with the oil bin inner cavity, and the oil outlet end of the capillary tube is communicated with the suction nozzle. The oil bin is provided with an air vent which communicates the oil bin inner cavity and the atmosphere, and also comprises a key assembly which can open or close the air vent. A circuit board and a circuit switch assembly for controlling whether a circuit key switch on the circuit board is turned onare also included. The key assembly and the circuit switch assembly are linked, and when the key assembly controls the air vent to open, the circuit switch assembly controls the circuit key switch toturn on; when the key assembly controls the vent to close, the circuit switch assembly controls the key switch to open. As that smoke oil can be quickly and timely supply to the heating component through the capillary tube for atomization, the us is not easy to suck large droplets, the atomization is sufficient, the smoke particles are fine and exquisite, the smoke mouthfeel is good, the smoke amount is large, the oral cavity is not scalded, and the user experience is good.

The invention belongs to the field of measurement of liquid temperature and refractive index, and specifically provides a capillary fiber refractive index sensor capable of measuring a liquid temperature and a liquid refractive index simultaneously. The invention provides a capillary fiber refractive index sensor. A light source is connected to an input fiber; the input fiber is connected with a sensing head portion, which connects to an output fiber; and the output fiber connects a wavelength demodulation instrument. The sensor is characterized in that the sensing head portion comprises a single-mode fiber written with a Bragg fiber grating connecting with a capillary fiber written with a Bragg fiber grating. The capillary fiber employs a single cladding capillary fiber or a double cladding capillary fiber. The input fiber and the output fiber are single-mode fibers. The incident light is a wide spectrum light source. The sensor of the invention has a simple and compact structure anda high sensitivity, and is convenient for measurement.

The invention discloses an in-tube solid-phase micro-extraction column and a preparation method thereof, and belongs to the technical field of analytic chemistry sample pretreatment. The in-tube solid-phase micro extraction column is composed of a quartz capillary tube and a graphene oxide coating layer, wherein the graphene oxide coating layer is fixed on the inner wall of the quartz capillary tube through chemical bonding. During preparation, the inner wall of the quartz capillary tube is successively washed with an acid, washed with an alkali and blown to dry by nitrogen, a toluene solution containing 3-aminopropyltriethoxysilane (APTES) is poured into the capillary tube, the capillary tube has both ends sealed and is placed in a water bath for reaction, then a graphene oxide aqueous solution activated by 1-ethyl-3-(3-dimethylaminopropyl)-carbide diimine/N-hydroxy succinimide (EDC/NHS) is poured into the capillary tube, the capillary tube has the both ends sealed and is subjected to a reaction in the water bath, the graphene oxide is allowed to be bonded to the quartz capillary tube wall, and the in-tube solid-phase micro-extraction column is obtained. The in-tube solid-phase micro-extraction column has simple and rapid preparation method, allows the graphene coating layer to have good chemical property, mechanical property and thermal stability, has high extraction capacity and long service life, and has broad application prospects in the analytic chemistry and environmental analysis fields.

A method a system and a program storage device for predicting a property of a fluid from a subterranean reservoir containing heavy oil entrained with gas. The method includes developing a baseline correlation between gas relative permeability k(rg) and gas saturation S(g), and capillary number N(c) calculated from a plurality of cells and at least one of critical gas saturation S(gc) and gas relative permeability k(rgro) based upon plurality of depletion rates. The baseline correlation is then adjusted to comport with at least one of S(gc) and k(rgro) to produce a plurality of corresponding adjusted baseline correlations where gas relative permeabilities k(rg) are selected. A reservoir simulation is then run utilizing the selected relative permeabilities k(rg) to predict a property of at least one fluid.

The invention provides an atmosphere interface ion source and a mass spectrometer. The atmosphere interface ion source comprises a capillary tube and a repulsion electrode, wherein one end of the capillary tube stretches into the mass spectrometer and the other end of the capillary tube is arranged in atmosphere; a sample ion flow is formed by sample ions by an air pressure difference between the inside of the mass spectrometer and the atmosphere and is sucked into the mass spectrometer through the capillary tube; an included angle alpha between the capillary tube and a mass analyzer of the mass spectrometer is 80-150 degrees; and the repulsion electrode is mounted at the outer side of the included angle alpha; direct-current voltage of 110-380 volts is applied to the repulsion electrode so that the flying direction of the sample ions with low kinetic energy in the sample ion flow passing through the capillary tube is changed for 180 degrees-alpha and the sample ions enter the mass analyzer. The mass spectrometer disclosed by the invention comprises the atmosphere interface ion source disclosed by the invention. According to the atmosphere interface ion source and the mass spectrometer, only the stable sample ions with the low kinetic energy can enter the mass analyzer and fog drop residues with the great kinetic energy and the like can be effectively separated. Therefore, the atmosphere interface ion source and the mass spectrometer has the advantages of high analysis precision, high sensitivity and high signal to noise ratio.

The present invention relates to a fluid conduit system and manufacture thereof, for the propulsion of fluids. The micro- or millifluidic system is useful within LOC, POC diagnostics digital ELISA, drug delivery applications or sampling. The system includes a capillary pump and a fluid conduit operationally connected to the pump, and a gas-permeable liquid-sealed unit with a vent hole gas-permeable to the outside. The fluid conduit includes a first conduit zone prefilled or pre-Tillable with a first volume of trigger liquid, upstream of the unit with the vent hole, a third conduit zone with a further volume, upstream of the capillary pump, and a second conduit zone pre-filled or pre-Tillable with a working liquid between the first and third conduit zones, connected to both, and directly connected to the first conduit zone. The first volume is proportionally larger than or equal to the volume of the third conduit zone.

The invention relates to a plastic processing method for a magnesium alloy capillary tube, which comprises the following steps: heating a magnesium alloy casting billet to 100-300 DEG C, pre-heating a rod extrusion die to 300-450 DEG C, performing extrusion, controlling the extrusion ratio to be 10-25 and controlling the extrusion speed to be 20-30mm/s; intercepting a magnesium alloy rod with the length of 10-50mm after annealing, and processing into a tube blank; placing the tube blank into a divided flow extrusion die for extrusion under the conditions that the extrusion temperature is 100-300 DEG C, the extrusion ratio is 16-64 and the speed of a punch head of the extrusion die is 20-30mm/s, and getting the capillary tube with the wall thickness of 0.1-0.5mm and the length of 300-1000mm; and then performing destressing annealing treatment and getting the magnesium alloy capillary tube. The process is simple, the cost is low, the processing efficiency is high, the manufactured magnesium alloy capillary tube has good surface quality, the tube wall thickness is uniform, the flatness is ideal, structure is uniform, the mechanical properties are higher, and the plastic processing method can be used for manufacturing a stent in blood vessel.

The leakage search assembly has a main device which contains a vacuum pump and a test gas sensor, and a hand-held sniffing probe. Capillary lines which connect the sniffing probe to the basic assembly contain valves by means of which these lines can be selectively opened. In a leakage search mode, the capillary line having the larger cross section is open. This results in leaks also being found from a greater distance. The dead time before response of the test gas sensor is shortened. Once a leak has been located, the assembly is switched to the leakage rate measurement mode, in which only the capillary line with the smaller cross section is open. This results in quantitative determination of the leakage rate with high accuracy and high stability.

Disclosed is a biosensor device, comprising: a capillary tube with probe molecules immobilized on the inner wall surface thereof, and a liquid sample containing target molecules, said biosensor device being characterized in that a contact angle between the inner wall surface of the capillary tube and the liquid sample changes because of the specific interaction between the probe molecules and the target molecules, which leads, in turn, to a change in the height of the liquid sample in the capillary tube.

The invention discloses a dispenser, which comprises a shell, a side plate enclosing the shell, a distribution port penetrating the side plate and used for connecting a capillary tube, and a refrigerant pipe communicated with the shell, wherein the diameter of the distribution port is greater than that of the capillary tube, and a reducer pipe is arranged between the distribution port and the capillary tube. A baffle with a through hole is arranged in a cavity, and the baffle disperses a refrigerant while buffering a refrigerant stream in order to realize uniform distribution of the refrigerant. Meanwhile, the diameter of the distribution port is increased, and the reducer pipe is arranged between the distribution port and the capillary tube, so the welding difficulty is reduced, pipe deformation or leakage caused by welding is prevented; meanwhile, by the large-diameter distribution port, the non-uniform distribution of the refrigerant nearby the distribution port is further reduced, so the distribution of the refrigerant inside the capillary tube is improved. The purpose of distributing liquid uniformly is really achieved, so capillary tubes are balanced; moreover, by the structure, the noise is reduced, and the user satisfaction degree is increased.

The invention relates to the field of analytical instrument research, and particularly relates to a detection method of a high-sensitivity laser-induced fluorescence detection device suitable for detection on a capillary column. The high-sensitivity laser-induced fluorescence detection device is characterized in that laser light is emitted from a laser, is filtered by a laser light filter, reflected by a dichroscope placed at a 45-degree angle relative to a horizontal plane and focused by an objective lens and finally enters a channel of a circular capillary tube from a position horizontally deviating from the center of the capillary tube by a certain distance so as to excite a component to be tested in the channel to generate fluorescence, and the fluorescence generated by excitation is collected by the objective lens, passes through the dichroscope, a focusing lens, a spatial filtering micropore and a fluorescence light filter respectively and finally enters a photoelectric detection device. The detection method not only is suitable for micro-column separation systems of capillary electrophoresis, capillary chromatography, capillary electrochromatography and the like, but also can be applied to analytic systems for flow injection analysis, sequence injection analysis, microfluidic liquid drop analysis, flow cytometry and the like based on circular capillary flow cells.