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Matching the Density of Particle and Fluid for PIV Applications

| Categories: Flow Visualization, Particle Image Velocimetry
Product Code: UVPMS-BG-1.00 (Cospheric LLC) Fluorescent Microspheres Precision Density of 1.00g/cc

Density of particle vs. density of fluid in particle image velocimetry: Many flow visualization experiments are done in water but there are a variety of other liquids and even water-based solutions that will have differing densities whose velocity fields are being mapped or will be in the future. Therefore, having seed particles to match these differing densities is important…

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Particle Image Velocimetry – Particle Size and Distribution

| Categories: Flow Visualization, Particle Image Velocimetry
Density of Microspheres - Silver Coated Hollow Glass

Particle size: Particle size is connected to many of the other parameters of seed particles in a PIV system. With size affecting visibility, flow conformity, and being integral in relation to pixel size. A rough number for ideal particle size is 1-100um though sizes in the nm and mm?s have been used for certain PIV applications. With smaller sizes…

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Particle Image Velocimetry – Intro to Tracer Particle Parameters

| Categories: Biomedical Microspheres, Flow Visualization, Particle Image Velocimetry
Silver Coated Hollow Glass Microspheres

PIV is a vast field with varying techniques and differing areas of research. Techniques vary from 2D PIV, only viewing velocity in a plane of the fluid system, to high speed TOMO PIV which views a 3D area of fluid and can be time resolved allowing for acceleration data to also be obtained. Another difference is that the size…

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Particle Image Velocimetry and Tracer Particle Visibility

| Categories: Applications of Microspheres, Fluorescent Microspheres, Particle Image Velocimetry, Phosphorescent Particles, Retroreflective Microspheres
Microspheres in Biotechnology - Modeling of Bacteria Behavior

Particle Image Velocimetry (PIV) expresses a vast field with varying techniques and data acquisition methods. However, the main goal is providing an optical method of flow visualization. The exact information obtained depends on which method is used, with new algorithms and approaches being discovered constantly. There are generally two ways data is obtained PIV and Particle Tracking Velocimetry (PTV)…

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12th International Symposium on Particle Image Velocimetry

| Categories: Microsphere Basics
Sourcing Microspheres - Monodisperse Silica

Cospheric participated in the 12th International Symposium on Particle Image Velocimetry in Busan, Korea, with the hope of sharing knowledge about seeding particles involved in PIV research and advancements in microsphere technology which would benefit the work being done in flow visualization. Through conversations with many attendees we were able to gather information on some of the important factors…

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Use of Polyethylene Spheres to Study Effect of Microplastics Transport in Soil

| Categories: Applications of Microspheres, Microparticles, Microplastics, Polyethylene Microspheres, Research
Effect on Microplastics Transport

Despite great general benefits derived from plastic use, accumulation of plastic material in ecosystems, and especially microplastics, is becoming an increasing environmental concern. Microplastic has been extensively studied in aquatic environments, with very few studies focusing on soils. Overview of the study on microplastics transport in soil: Scientists tested the idea that microplastic particles (polyethylene beads) could be transported…

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Fluorescent Glass Microspheres

| Categories: Coatings, Color Microspheres, Flow Visualization, Fluorescent Microspheres, Glass microspheres, Retroreflective Microspheres
Fluorescent Red Coated Soda Lime Glass Microspheres

Solid glass microspheres hemispherically coated with fluorescent coatings, a fluorescent coating is precisely applied to half of the core sphere, making the glass spheres appear colorful and fluorescent at daylight and exhibit bright fluorescent response under UV light.

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Janus Particles – Properties and Applications

| Categories: Biomedical Microspheres, Coatings, Color Microspheres, Fluorescent Microspheres, Glass microspheres, Microsphere news, Research
Bichromal (half-white half-black or any other color) Microspheres, Janus Particles

What are Janus Particles? Named after two-faced Roman god Janus who looks to both the future and the past, Janus particles are typically microscopic spheres composed of two different regions. Originally the term “janus particles” was used in reference only to particles that had a hydrophobic surface on one hemisphere and a hydrophilic surface on another. The first “Janus…

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Stainless Steel Microspheres

| Categories: Applications of Microspheres, Bond Line Spacers, Conductive Microspheres, Metal Microspheres, Microsphere news
Metal Materials for Microsphres - Stainless Steel Spheres

Microspheres with high density (7.8g/cc), high sphericity (>90% round) and corrosion resistance (300 series stainless steel)

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Large Polystyrene Spheres Available

| Categories: Microsphere news, Precision Spheres
Polypropylene Polymer Spheres, Beads, Balls

Precision Large Polystyrene (PS) Spheres now available. Sizes of 2mm and 4.4mm, with Size ranges as narrow as 0.2% CV (Coefficient of Variation)

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Microspheres Online:

Microspheres Online is a digital database and a compilation of technical resources on microspheres and precision spherical particles. The resources are compiled and maintained by Cospheric LLC - the leading manufacturer and global supplier of precision spherical particles based in Santa Barbara, CA, USA.

The intention for this resource is to provide a service to the scientific community word-wide enabling breakthroughs in science and technology.

What are Microspheres?

Microspheres are spherical particles on the micro scale (between 1micron and 1000micron (1mm) in diameter). Spherical particles below 1micron we consider to be nanoscale and therefore call them nanospheres. Spheres over 1mm in diameter are simply called spheres, beads, or balls.

Microspheres are solid, meaning they might be completely solid throughout or they might have a solid wall (shell).

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