Aspects relate to systems and methods for fluid sensing using passive flow. An exemplary system includes a microfluidic device, the microfluidic device including at least a reservoir configured to contain at least a fluid and at least a passive flow component in fluidic communication with the at least a reservoir and configured to flow the at least a fluid with predetermined flow properties, at least an sensor device configured to be in sensed communication with the at least a fluid and detect at least a sensed property; and at least an sensor interface configured to wet at least a surface of the at least a sensor device with the at least a fluid.

Apparatuses and methods designed to allow for on-site, on-demand measurement of rheological properties of a sample are disclosed. The apparatuses and methods utilize both a visual component (e.g., a camera) to obtain information about the sample for making such rheological property determinations and an integrated electrical circuit to apply a current to the sample for also making such rheological property determinations. The application of the current is done in a manner such that a thinning behavior of the sample is unaffected. Further, the apparatuses are configured in a manner that allow them to be portable so that samples can be analyzed shortly after they are received, at a point-of-use. Various configurations and methods associated with such apparatuses are also disclosed.

A gel-time detection apparatus includes a carrier, a stirring device, and an image-capturing device. The gel-time detection apparatus uses the carrier to liquefied powder to be detected, uses the stirring device to stir the liquefied powder and sense the torque of stirring the liquefied powder, and uses the image-capturing device to capture images of the liquefied powder, so as to determine a gel time according to a determination criterion relevant to the torque and the images. A gel-time detection method includes liquefying powder to be detected, stirring the powder, sensing the torque of stirring the liquefied powder, capturing images of the liquefied powder, and then determining a gel time according to a determination criterion relevant to the torque and the images. The determination criterion may include a torque predetermined threshold and an area-shrinkage-rate predetermined threshold.

The invention provides a viscometer and an operation method thereof. The viscometer comprises a disk and at least one microfluidic structure. The microfluidic structure is embedded in the disk and has a first chamber which is connected to a second chamber. The second chamber is provided with an annular chamber along the circumferential direction of the disk and comprises at least one indicator. Overall, the present viscometer and its operation method do utilize the oscillation amplitude of pendulum motion of the indicator to calculate a viscosity value (cP) of a sample which has already existed in the second chamber.

Disclosed herein is a method for assessing a flow a sprayed coating, including the steps of spraying a coating onto a surface and capturing a plurality of images of the sprayed surface at a predetermined frequency within a predetermined interval of time, and a computer program product for assessing a flow of a sprayed coating.

The present disclosure relates to a device for viscosity or viscoelasticity measurement comprising: a structure comprising a horizontal rotatable cylinder-shaped section for receiving a liquid whose viscosity or viscoelasticity is to be measured; a light source arranged for emitting light onto the liquid surface in rotation within said structure; an optical focusing screen arranged at an end of said cylinder-shaped section; an optical sensor for detecting a light spot, emitted by the light source and reflected by the liquid surface in rotation within the structure, impinging on the optical focusing screen; an electronic data processor arranged for calculating the viscosity or viscoelasticity of the liquid from the location of said light spot on said optical focusing screen. The present disclosure also relates to a method of manufacture of the device and a method for measuring viscosity or viscoelasticity of a liquid.

Methods, systems, and apparatus for analytical wettability assessment of fracturing proppants for improving fluid recovery are disclosed. Embodiments include determining, for a proppant sample, a first value related to an oil-wet index of the proppant sample. Embodiments further include determining, for the proppant sample, a second value related to a water-wet index of the proppant sample. Embodiments further include determining, for the proppant sample based on the first value and the second value, a third value related to a wettability index of the proppant sample. Embodiments further include determining, based on the third value, a wetting characteristic of the proppant sample. Other embodiments may be described.

An apparatus includes a process chip and a dynamic light scattering assembly. The process chip includes a fluid chamber including and an optically transmissive material adjacent to the fluid chamber. The process chip is to be removably positioned in relation to the dynamic light scattering assembly. The dynamic light scattering assembly is to direct the light through the optically transmissive material and into the fluid chamber. The dynamic light scattering assembly is further to receive light scattered by particles in fluid in the fluid chamber in response to the first optical fiber emitting light into the fluid chamber and thereby capture light scattering data. A processor determines viscosity of fluid in the fluid chamber based on the captured light scattering data. The processor also determines one or both of size or size distribution of particles in the fluid based the captured light scattering data.

A gel-time detection apparatus includes a carrier, a stirring device, and an image-capturing device. The gel-time detection apparatus uses the carrier to liquefied powder to be detected, uses the stirring device to stir the liquefied powder and sense the torque of stirring the liquefied powder, and uses the image-capturing device to capture images of the liquefied powder, so as to determine a gel time according to a determination criterion relevant to the torque and the images. A gel-time detection method includes liquefying powder to be detected, stirring the powder, sensing the torque of stirring the liquefied powder, capturing images of the liquefied powder, and then determining a gel time according to a determination criterion relevant to the torque and the images. The determination criterion may include a torque predetermined threshold and an area-shrinkage-rate predetermined threshold.

An air pressure-machine vision based system for measuring a rheological property of a viscoelastic material includes a machine body, a lifting experiment table system, an air pressure generation control system, an image collection system, and a controlling and information processing system, where the lifting experiment table system, the air pressure generation control system, the image collection system and the controlling and information processing system are mounted on the machine body; the lifting experiment table system includes a lifting table stepping motor, an L-shaped lifting table and a lifting table motor driver, and the lifting table motor driver is connected to the lifting table stepping motor and configured to drive the lifting table stepping motor; and the lifting table stepping motor is connected to the L-shaped lifting table and configured to control lifting of the L-shaped lifting table.