Film growth in boundary layer in 2 phase flow

preetham108 · September 22, 2010, 12:46

Hello Folks,

1) Is it possible to capture the growth of droplets and nucleation in boundary layer in the wet steam flows(Exhaust hood of steam turbine) using CFX/ math models

2) Has CFX got the capability to model and simulate the droplet condensation and its growth withing boundary layer or should it be supplemented by UDF? If so are there any tutorials etc..

Please share your experiences/ expertise in the area of steam turbine exhaust diffuser -pressure recovery/ loss estimation by wet steam flows/ bounday layer condensation/ vof[numerical methods] / computational requirements/ know-hows etc...

REF journals:
1) White A.J., Numerical Investigation of Condensing Steam Flow in Boundary Layers, International Journal of Heat and Fluid Flow,Vol.21, pp. 727-734, 2000.

2) White A.J., Modeling Droplet Size Distribution in Poly-dispersed Wet Steam Flows, International
Journal of Heat and Mass Transfer, pp. 1873- 1874, 2000.

ghorrocks · September 22, 2010, 19:44

CFX has a number of technologies in this area. You will probably need to use something like the sub-cooled condensation modelling, I think there is a tutorial of it (or something like it) in CFX V12. In fact I think the tutorial example is of non-equilibrium condensation in a wet steam turbine so it will be very relevant for your work.

preetham108 · September 24, 2010, 00:50

Thanks Glenn, will look for the same.

September 22, 2010, 12:46	Film growth in boundary layer in 2 phase flow	#1
preetham108 New Member Preetham Join Date: Sep 2010 Posts: 6 Rep Power: 16	Hello Folks, 1) Is it possible to capture the growth of droplets and nucleation in boundary layer in the wet steam flows(Exhaust hood of steam turbine) using CFX/ math models 2) Has CFX got the capability to model and simulate the droplet condensation and its growth withing boundary layer or should it be supplemented by UDF? If so are there any tutorials etc.. Please share your experiences/ expertise in the area of steam turbine exhaust diffuser -pressure recovery/ loss estimation by wet steam flows/ bounday layer condensation/ vof[numerical methods] / computational requirements/ know-hows etc... REF journals: 1) White A.J., Numerical Investigation of Condensing Steam Flow in Boundary Layers, International Journal of Heat and Fluid Flow,Vol.21, pp. 727-734, 2000. 2) White A.J., Modeling Droplet Size Distribution in Poly-dispersed Wet Steam Flows, International Journal of Heat and Mass Transfer, pp. 1873- 1874, 2000.

September 24, 2010, 00:50	Thank you on your feedback	#3
preetham108 New Member Preetham Join Date: Sep 2010 Posts: 6 Rep Power: 16	Thanks Glenn, will look for the same.

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September 22, 2010, 19:44		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	CFX has a number of technologies in this area. You will probably need to use something like the sub-cooled condensation modelling, I think there is a tutorial of it (or something like it) in CFX V12. In fact I think the tutorial example is of non-equilibrium condensation in a wet steam turbine so it will be very relevant for your work.