Instabilities of two-phase flows in rectangular ducts

Gelfgat & Brauner, 2020, Int. J. Multihase Flowsh, to appear

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For expanations of visualization of 3D disturbances by vector potentials of divegence free velocity projections see:

 

Gelfgat A. Yu. 2014. Visualization of three-dimensional incompressible flows by quasi-two-dimensional divergence-free projections. Computers & Fluids, 97, 143-155. Get PDF file

 

Gelfgat A. Yu. 2016 Visualization of three-dimensional incompressible flows by quasi-two-dimensional divergence-free projections in arbitrary flow regions. Theor. Comput. Fluid Dyn., 30, 339-348.  Get PDF file

 

 

Horizontal duct

 

 

 

Animations of disturbance modes: square duct, liquid - liquid case

 

U1s=0.005, U2s=0.159:   PotenXY,   PotenXZ,   PotenYZ
U1s=0.05, U2s=0.0726:   PotenXY,   PotenXZ,   PotenYZ
U1s=0.13, U2s=0.0409:   PotenXY,   PotenXZ,   PotenYZ



Animations of disturbance modes: square duct, air - water case

U1s=0.431, U2s=0.003:   PotenXY,   PotenXZ,   PotenYZ
U1s=0.413, U2s=0.02:   PotenXY,   PotenXZ,   PotenYZ
U1s=0.0152, U2s=2:   PotenXY,   PotenXZ,   PotenYZ

 

 

 

Inclined duct

 

Animations of disturbance modes: square duct, air - water case

U1s=-0.53, U2s=-0.005, b=0.1o:   PotenXY,   PotenXZ,   PotenYZ
U1s=-0.514, U2s=0.01,
b=0.1o:   PotenXY,   PotenXZ,   PotenYZ









 

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