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・ Static induction thyristor
・ Static induction transistor
・ Static interpretation of time
・ Static key
・ Static library
・ Static lift
・ Static light scattering
・ Static line
・ Static line (disambiguation)
・ Static Line (magazine)
・ Static Major
・ Static margin
・ Static memory allocation
・ Static mesh
・ Static Migration
Static mixer
・ Static Nocturne
・ Static Nunatak
・ Static on the Airwaves
・ Static Peak
・ Static Peak (Colorado)
・ Static Peak Divide
・ Static pressure
・ Static Prevails
・ Static program analysis
・ Static random-access memory
・ Static relay
・ Static Revenger
・ Static Rituals
・ Static rope


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Static mixer : ウィキペディア英語版
Static mixer

A static mixer is a precision engineered device for the continuous mixing of fluid materials. Normally the fluids to be mixed are liquid, but static mixers can also be used to mix gas streams, disperse gas into liquid or blend immiscible liquids. The energy needed for mixing comes from a loss in pressure as fluids flow through the static mixer. One design of static mixer is the plate-type mixer and another common device type consists of mixer elements contained in a cylindrical (tube) or squared housing. Mixer size can vary from about 6 mm to 6 meters diameter. Typical construction materials for static mixer components included stainless steel, polypropylene, Teflon, PVDF, PVC, CPVC and polyacetal.
== Design ==

In the plate type design mixing is accomplished through intense turbulence in the flow.
In the housed-elements design the static mixer elements consist of a series of baffles made of metal or a variety of plastics. Similarly, the mixer housing can be made of metal or plastic. The housed-elements design incorporates a method for delivering two streams of fluids into the static mixer. As the streams move through the mixer, the non-moving elements continuously blend the materials. Complete mixing depends on many variables including the fluids' properties, tube inner diameter, number of elements and their design. The housed-elements mixer's fixed, typically helical elements can simultaneously produce patterns of flow division and radial mixing:
* Flow division: In laminar flow, a processed material divides at the leading edge of each element of the mixer and follows the channels created by the element shape. At each succeeding element, the two channels are further divided, resulting in an exponential increase in stratification. The number of striations produced is 2n where 'n' is the number of elements in the mixer.
* Radial mixing: In either turbulent flow or laminar flow, rotational circulation of a processed material around its own hydraulic center in each channel of the mixer causes radial mixing of the material. Processed material is intermixed to reduce or eliminate radial gradients in temperature, velocity and material composition.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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