In one aspect of the present disclosure, a streamlined body for passing through a fluid is provided. The streamlined body includes an outer surface defining a leading edge and a trailing edge. The leading edge is oriented to pass through the fluid before the trailing edge during movement of the body through the fluid. The streamlined body further includes a plurality of fibers coupled to the outer surface. Each fiber of the plurality of fibers projects away from the outer surface.

Systems and methods are described herein to implement transverse momentum injection at low frequencies to directly modify large-scale eddies in a turbulent boundary layer on a surface of an object. A set of transverse momentum injection actuators may be positioned on the surface of the object to affect large-scale eddies in the turbulent boundary layer. The system may include a controller to selectively actuate the transverse momentum injection actuators with an actuation pattern to affect the large-scale eddies to modify the drag of the fluid flow on the surface. In various embodiments, the transverse momentum injection actuators may be operated at frequencies less than 10,000 Hertz.

Systems and methods are described herein to implement transverse momentum injection at low frequencies to directly modify large-scale eddies in a turbulent boundary layer on a surface of an object. A set of transverse momentum injection actuators may be positioned on the surface of the object to affect large-scale eddies in the turbulent boundary layer. The system may include a controller to selectively actuate the transverse momentum injection actuators with an actuation pattern to affect the large-scale eddies to modify the drag of the fluid flow on the surface. In various embodiments, the transverse momentum injection actuators may be operated at frequencies less than 10,000 Hertz.

Various implementations include a fluid treatment device. The device includes an outer tube, an inner tube, a plurality of blades, and a media. The outer tube includes an inner surface. The inner tube is coaxially disposed within the outer tube. An outer surface of the inner tube and the inner surface of the outer tube define an annulus that axially extends between the ends of the inner tube. The plurality of blades is disposed within the annulus. The plurality of blades is configured to alter a component of a flow direction of fluid flowing over the blades in a circumferential direction and/or a radial direction. The media is disposed within the inner tube. The inner tube defines a plurality of perforations extending between its outer surface and inner surface. The annulus defines an entire flow path of fluid flowing between the outer tube and the inner tube.

Various implementations include a fluid treatment device. The device includes an outer tube, an inner tube, a plurality of blades, and a media. The outer tube includes an inner surface. The inner tube is coaxially disposed within the outer tube. An outer surface of the inner tube and the inner surface of the outer tube define an annulus that axially extends between the ends of the inner tube. The plurality of blades is disposed within the annulus. The plurality of blades is configured to alter a component of a flow direction of fluid flowing over the blades in a circumferential direction and/or a radial direction. The media is disposed within the inner tube. The inner tube defines a plurality of perforations extending between its outer surface and inner surface. The annulus defines an entire flow path of fluid flowing between the outer tube and the inner tube.

A gas flow conditioner in the flow bend in an ultrasonic flow meter has at least one longitudinal dividing plate provided in an inner space of the flow bend. The flow bend can be provided with an inlet curved section, a middle straight section, and an outlet curved section, wherein axes of the inlet curved section and the outlet curved section are in a parallel direction and connected to a pipe opening of size DN.

A gas flow conditioner in the flow bend in an ultrasonic flow meter has at least one longitudinal dividing plate provided in an inner space of the flow bend. The flow bend can be provided with an inlet curved section, a middle straight section, and an outlet curved section, wherein axes of the inlet curved section and the outlet curved section are in a parallel direction and connected to a pipe opening of size DN.

A manifold (400, 600, 700) with reduced vortex shedding, a vibrator) meter (5) including the same, and a method of manufacturing both are described. The manifold (400, 600, 700) comprises a first conduit section (202), a second conduit section (204), a splitter section (406, 606, 706) positioned between the first conduit section (202) and the second conduit section (204), the splitter section (406, 606, 706) including a first splitter face (408a, 608a, 708) facing the first conduit section (202), and a first protrusion (412a, 612a. 712), at least a portion of which is positioned on the first splitter face (408a, 608a, 708).

A manifold (400, 600, 700) with reduced vortex shedding, a vibrator) meter (5) including the same, and a method of manufacturing both are described. The manifold (400, 600, 700) comprises a first conduit section (202), a second conduit section (204), a splitter section (406, 606, 706) positioned between the first conduit section (202) and the second conduit section (204), the splitter section (406, 606, 706) including a first splitter face (408a, 608a, 708) facing the first conduit section (202), and a first protrusion (412a, 612a. 712), at least a portion of which is positioned on the first splitter face (408a, 608a, 708).

Material flow modifiers as disclosed herein overcome drawbacks associated with known adverse flow conditions (e.g., surface erosion, head losses, particulate drop-out, and the like) that arise from flow of certain types of materials (e.g., fluids, slurries, particulates, flowable aggregate, and the like) through a material flow conduit. Such material flow modifiers provide for flow of flowable material within a flow passage of a material flow conduit (e.g., a portion of a pipeline, tubing or the like) to have a rotational flow profile. Advantageously, the rotational flow profile centralizes flow toward the central portion of the flow passage, thereby reducing magnitude of laminar flow to overcome the aforementioned adverse flow conditions.