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MIXING & SEGREGATION, CONVECTIVE MIXING - Coggle Diagram

- - - - -DRAG GOVERNED BY STORKES' LAW
        -PROJECTED HORIZONTALLY
        -PARTICLES WITH 2 TIMES DIAMETER TRAVELS 4 TIMES FAR BEFORE COMING TO REST
    - - -REARRANGEMENT IN THE PACKING OF PARTICLES OCCUR WHEN MASS OF PARTICLES IS DISTRIBUTED CAUSING INDIVIDUAL PARTICLES MOVE
        -POWDER CONSIST OF DIFFERENT PARTICLES SIZE RESULTING IN SMALL PARTICLES TO FALL DOWNWARDS THROUGH GAPS
        -HAPPENS DURING SHAKING, STIRRING, VIBRATION OR POURING PARTICLE INTO A HEAP
        -OCCUR IN CHARGING OR DISCHARGING STORAGE HOPPER
    - - -IF A MIXTURE OF PARTICLES OF DIFFERENT SIZE IS VIBRATED, THE LARGER PARTICLES MOVE UPWARDS
        -BRAZIL-NUT EFFECT
        -THE RISE OF THE LARGER OR DENSER 'INTRUDER' WITHIN THE BED OF SMALLER PARTICLES (HAS BEEN EXPLAINED IN TERMS OF CREATION AND FILLING OF VOIDS BENEATH THE INTRUDER
    - - -OCCUR WHEN A POWDER CONTAINING AN APPRECIABLE PROPORTION OF PARTICLES UNDER 50um IS CHARGED INTO A STORAGE VESSEL OF HOPPER ( AIR IS DISPLAYED UPWARDS)
        
        THE UPWARDS AIR VELOCITY MAY EXCEED THE TERMINAL FREEFALL VELOCITY OF SOME FINER PARTICLES (MAY REMAIN IN SUSPENSION AFTER THE LARGER PARTICLES HAVE SETTLED
        -A POCKET OF FINE PARTICLES IS GENERATED IN THE HOPPER EACH TIME SOLIDS ARE CHARGED
  - - - VARIATIONS IN BULK DENSITY OF THE POWDER GOING TO PACKAGING
      - NOT POSSIBLE TO FIT 25KG INTO 25KG BAG
    - - CHEMICAL COMPOSITIONS OF THE PRODUCTS MAY BE OFF SPECIFICATION
  - - - MOBILITY REDUCTION REDUCED SEGREGATION AND PERMITS BETTER MIXING
    - - CAUSING PARTICLES TO STICK TOGETHER (PREVENT SEGREGATIONS)
- - - - OCCURS WHEN PARTICLES ROLLS DOWN A SLOPING SURFACE
    - - SHEAR STRESS GIVE RISE TO SLIP ZONE AND MIXING TAKES PLACE BY INTERCHARGE OF PARTICLES BETWEEN LAYERS WITHIN THE ZONES
  - - - -V-MIXER
        -DOUBLE CONE MIXER
        -ROTATING CUBE MIXER
    - - -RIBBON BLENDER
        -NAUTAMIXER
    - - RELY ON NATURAL MOBILITY AFFORDED PARTICLES IN THE FLUIDIZED BED
    - - THE EMPHASIS IS ON BREAKING DOWN AGGLOMERATES OF THE COHESIVE POWDERS RATHER THAN BREAKING INDIVIDUAL PARTICLES