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Law-of-the-wall and Wall functions

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Old   September 11, 2002, 04:50
Default Law-of-the-wall and Wall functions
  #1
Bo Busk Jensen
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Hallo All

A very simple question. Using standard k-e models the near-wall region should be described by....

1) is it described by a wall function that use what is stated in the law-of-the-wall

2) is it described by the law-of-the-wall

Are wall functions a general term for different ways of treating what is inside y+ 30, where the law-of-the-wall is one way to do it??

Regards

Bo
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Old   September 11, 2002, 07:29
Default Re: Law-of-the-wall and Wall functions
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Abhi
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hi i can probably answer you but i didn't understand ur questin. Can you please clearly tell again?
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Old   September 11, 2002, 08:13
Default Re: Law-of-the-wall and Wall functions
  #3
Bo Busk Jensen
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Hallo All

A very simple question. Using standard k-e models the near-wall region should be described by....

1) a wall function that use the law-of-the-wall

2) the law-of-the-wall

Are wall functions a general term for different ways of treating what is inside y+ = 30??

Regards

Bo
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Old   September 11, 2002, 09:06
Default Re: Law-of-the-wall and Wall functions
  #4
Jim Park
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My understanding is that:

1. "Wall functions" are a way of modeling the complex turbulent fluid behavior very near a solid wall that bounds a turbulent flow, and

2. The "law of the wall" is the result of many careful measurements of one configuration of turbulent flow, the flow over a flat plate.

So, there is the general technique and a particular example.
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