Spinning disk

Fig. 3. Typical design elements for wet-in (a)a spinning disk deagglomerates powder just prior to wet-in (b) a rotor breaks clumps as they wet-in, andcentrifugal force helps submerge nonbuoyant powders and (c) a disk impeller provides a rapidly refreshedHquid surface. In (a) and (c), the system may...

Hquid is fed into center of spinning disk, cup, or wheel, and spreads out toward rim produces a 360° spray pattern and relatively uniform drop size used in spray drying and cooling appHcations... 

D. Laminar, stationary disk Laminar, spinning disk... 

To stop a fine dust of the salts from being discharged into the conditioned space. This is particularly important in the case of spinning-disk or spray-type humidifiers. 

Humidification The process of adding moisture to air by spinning disk, ultrasonic, steam, direct water injection, or other methods. 

At the solid walls, the boundary conditions state that the velocity is zero (i.e. no slip). Also at the walls, the temperature is either fixed or a zero-gradient condition is applied. At the surface of the spinning disk the gas moves with the disk velocity and it has the disk temperature, which is constant. The inlet fiow is considered a plug fiow of fixed temperature, and the outlet is modeled by a zero gradient condition on all dependent variables, except pressure, which is determined from the solution. 

PR Byron, AJ Hickey. Spinning-disk generation and drying of monodisperse solid aerosols with output concentrations sufficient for single-breath inhalation studies. J Pharm Sci 76 60-64, 1987. 

There are three types of mass transport processes within a microfluidic system convection, diffusion, and immigration. Much more common are mixtures of three types of mass transport. It is essential to design a well-controlled transport scheme for the microsystem. Convection can be generated by different forces, such as capillary effect, thermal difference, gravity, a pressurized air bladder, the centripetal forces in a spinning disk, mechanical and electroosmotic pumps, in the microsystem. The mechanical and electroosmotic pumps are often used for transport in a microfluidic system due to their convenience, and will be further discussed in section 11.5.2. The migration is a direct transport of molecules in response to an electric field. In most cases, the moving... 

Nolte, D. D. Regnier, F. E., Spinning disk interferometry The BioCD, Opt. Photon. News 2004,48 53... 

Rotary Atomization Spinning Disk 10-200 Spray drying. Aerial distribution of pesticides. Chemical processing Good mono-dispersity of droplets. Independent control of atomization quality and liquid flow rate Satellite droplets, 360° spray pattern... 

In an evaluation of various techniques for droplet generation,1[88] periodic vibration of liquid jet, spinning disk and ultrasonic atomization techniques have been rated as the most appropriate methods for producing monodisperse sprays. These techniques were found to be very effective and appeared promising for refinement,... 

Some design concepts for generating uniform droplets have been proposed by Lee et al.[88] These include (a) centrifugal type chamber, (b) atomization by two opposing air-liquid jets, and (c) spinning disk coupled with an ultrasonic field. Some other conceptions include (d) rocket nozzle chamber, (e) frozen particles, (f) rotating brush, and (g) periodic vibrations using saw-tooth waves, etc. 

Drops, like bubbles, can be formed by nozzles, and also by microburettes, spinning disks, or swirl chambers. The various methods have been discussed by Batchelor and Davis (Bl) in their monograph. The simplest method of forming drops is from nozzles and is most commonly employed the present review is restricted to this mode only. 

Early in 1970, Few et al. [10] radiolabelled polystyrene particles for a mucociliaiy clearance study. The radiolabelled aerosols were produced by a spinning-disk generator. The technique involves the key steps of extracting sodium pertechnetate (Na " Tc04) into chloroform as tetraphenylarsonium pertechnetate, followed by evaporation of the chloroform. A solution of polystyrene is added to the radioactive residue and dispersed Scheme 1). This technique has subsequently been adopted by... 

Buranachai C, Kamiyama D, Chiba A et al (2008) Rapid frequency-domain FLIM spinning disk confocal microscope lifetime resolution, image improvement and wavelet analysis. JFluoresc 18 929-942... 

The SpinTek technology involves membranes that are bonded to two sides of a disk. Multiple disks are mounted on a hollow shaft that rotates the membranes, and stationary turbulent promoters are mounted near the rotary membranes to create high shear and turbulence. Liquid waste is pumped into the system that hits the spinning disk and spreads across the membrane. Centrifugal force pulls the solid waste outward to the perimeter of the filter disks, where it is removed from the system. By pulling the solids outward, the centrifugal force keeps the filter clear so that the system can run continuously. 

There are a number of techniques for generating aerosols, and these are discussed in detail in the LBL report (1979) and in volumes edited by Willeke (1980) and Liu et al. (1984). We briefly review here the major methods currently in use these include atomizers and nebulizers, vibrating orifices, spinning disks, the electrical mobility analyzer discussed earlier, dry powder dispersion, tube furnaces, and condensation of vapors from the gas phase. 

In general terms, the top- and tangential-spray processes may be less demanding in their requirements with respect to airflow. In the former, the fluidization pattern is quite random in the latter, much of the burden for creating motion falls on the spinning disk, so that the incoming air is required only to ... 

For a radial segment of a rotating metallic disk, driven to spin vertically by a mechanical power source, the linear velocity at a distance r from the center is (Or, where (0 is the angular velocity of the spinning disk. The induced potential, dE, due to the... 

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