[ICEM] Ortho smoothing problem

Mazze[ITA] · May 1, 2011, 14:06

Hi all, I'm working on a turbine blade simulation and I found some problems achieving convergence. I decided to smooth the mesh (hexa multi-block structured), but the pre-mesh orthogonality smoothing freezing the fluid parts (boundaries) caused negative volumes. So I tried a compromise solution freezing each part (solid and fluid) with the respective first layer, reaching the result of a smoothed mesh with zero n.v. (except for the superficial mesh and the first layer, obviously). The main problem is the uncontrolled ratio between the first frozen layer and the second smoothed one.
Does anyone know a way to smooth the mesh controlling the ratio of the first layers (the shear layer)?

Mazze[ITA] · May 3, 2011, 02:17

I didn't find the right solution, but I controlled the problem freezing about 20 layers on the surface of the blade. The high ratio is still there, but further from surface.

May 1, 2011, 14:06	Ortho smoothing problem	#1
Mazze[ITA] Member Lorenzo Mazzei Join Date: Dec 2010 Posts: 60 Rep Power: 15	Hi all, I'm working on a turbine blade simulation and I found some problems achieving convergence. I decided to smooth the mesh (hexa multi-block structured), but the pre-mesh orthogonality smoothing freezing the fluid parts (boundaries) caused negative volumes. So I tried a compromise solution freezing each part (solid and fluid) with the respective first layer, reaching the result of a smoothed mesh with zero n.v. (except for the superficial mesh and the first layer, obviously). The main problem is the uncontrolled ratio between the first frozen layer and the second smoothed one. Does anyone know a way to smooth the mesh controlling the ratio of the first layers (the shear layer)?

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
area does not match neighbour by ... % -- possible face ordering problem	St.Pacholak	OpenFOAM	10	February 7, 2024 21:50
Incoherent problem table in hollow-fiber spinning	Gianni	FLUENT	0	April 5, 2008 10:33
natural convection problem for a CHT problem	Se-Hee	CFX	2	June 10, 2007 06:29
Adiabatic and Rotating wall (Convection problem)	ParodDav	CFX	5	April 29, 2007 19:13
Hexa smoothing (ICEM CFD 10.0)	CFDworker	CFX	3	November 2, 2005 10:23

May 3, 2011, 02:17		#2
Mazze[ITA] Member Lorenzo Mazzei Join Date: Dec 2010 Posts: 60 Rep Power: 15	I didn't find the right solution, but I controlled the problem freezing about 20 layers on the surface of the blade. The high ratio is still there, but further from surface.