# yplus=o???????,in wall function,kepsilon,need help

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 October 15, 2006, 02:49 yplus=o???????,in wall function,kepsilon,need help #1 ramy Guest   Posts: n/a flow of water,steady and isothermal case,kepsilon,wall function:standard yplus =o------ whats the problem? best regards

 October 15, 2006, 03:19 Re: yplus=o???????,in wall function,kepsilon,need #2 sam Guest   Posts: n/a is there any sepration in the region of y plus 0?

 October 15, 2006, 03:27 Re: yplus=o???????,in wall function,kepsilon,need #3 ramy Guest   Posts: n/a I don't understand your question

 October 15, 2006, 06:17 Re: yplus=o???????,in wall function,kepsilon,need #4 ice Guest   Posts: n/a when did you check the y+, before the Iteration or after it?

 October 15, 2006, 10:20 Re: yplus=o???????,in wall function,kepsilon,need #5 ramy Guest   Posts: n/a after converging of results(after iteration)

 October 15, 2006, 12:46 Re: yplus=o???????,in wall function,kepsilon,need #6 Ralf Schmidt Guest   Posts: n/a Hi! Are you sure, that it is = 0 ??? it might be so small, that the resolution in the plot window make it appears like 0. Maybe, you are not plotting yplus on a wall - BUT it is only defined for a wall!! In other word: are u sure, that the bondary you used for plotting it a wall?? Another reason might be the plot direction. If you have a wall that is parallel to x-axis, and you plot on y-axis, Fluent returnes 0. Hope, it helps - I don't see any other explenation... Ralf

 October 17, 2006, 00:54 Re: yplus=o???????,in wall function,kepsilon,need #7 sam Guest   Posts: n/a y plus is calculated on the basis of shear stress. in the region of sepration therefore yplus(for wall fuction) = 0 . therefore i asked that are u reporting y plus 0 for the region of sepration of attached flow. hope u understand my point regards sam

 November 2, 2006, 07:02 convergence problem while using pressure inputs #8 Ashok kumar Guest   Posts: n/a I get convergence problem for incompressible flow when i use boundary inputs both in terms of pressure. I even reduced the relaxation to 0.1 for all the terms still i get the same problem. Anyone help me on this.

 November 3, 2006, 14:58 Re: convergence problem while using pressure input #9 babak Guest   Posts: n/a maybe you have reversed flow problem. check your operating pressure

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