Mist Formation Model
Consider a machining process in which a circular workpiece is rotating
in a horizontal plane. The workpiece rotates at angular velocity w, and
the cutting fluid jet has a diameter d and a flow rate Q. Depending on
the fluid discharge velocity, there are two different atomization modes:
drop mode and liament formation mode.
For low cutting fluid flow rate, the drop will seperate from the edge of
the surface when the centrifugal force is higher than the surface tension
force. Equating the centrifugal force and the surface tension force, we
can get the diameter of the main drop.Also, the mass fraction E of drops
to satellites can be obtained.
For higher fluid flow rate, the fluid disintegrate as ligament formaion
mode.The mean drop diameter D is also be obtained. And set the mass fraction
The cumulative distribution curve shows: as the flow rate is increased
the drop size ditribution widens, regardless of the rotational speed. Another
general trend exhibited by all the fluid except water is that an increase
in rotational speed causes the drop size distribution to broaden. The cumulative
ditribution plot shows these .
Assume that 20% of heat generated during the machining process causes evaporation.
From the conservation of thermal energy, the mass m of evaporation can