Effect of Wall Shear Stress Distribution on Manning Coefficient of Smooth Open Rectangular Channel Flows

Ahmet BİLGİL

Makale detayları

Effect of Wall Shear Stress Distribution on Manning Coefficient of Smooth Open Rectangular Channel Flows

Yazarlar:

Ahmet BİLGİL

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 2003 Vol.27 Issue 5, pp.305-314

Belge Tipi:

Makale

Yayın Tarihi:

4/2003

Belge Dili:

Türkçe

Document ID (Org No.):

2000745119

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160

Özet:

 

The determination of velocity distribution in open channel  flows is crucial in many critical engineering problems such as channel  design, calculation of energy losses and sedimentation.  In this  study, velocity distribution is experimentally investigated in a  smooth rectangular open channel.  Wall shear stresses are calculated  using measured local velocities.  Assuming logarithmic velocity  distribution along perpendiculars to a wetted perimeter, dimensionless  wall shear stresses K(I) = tw\bar{t}w and A and B constants  unique to the cross section in the Prandtl equation were calculated.   A correlation for friction coefficient in an open channel is developed  using measured wall shear stress distribution.  An improved relation  for the Manning coefficient on smooth rectangular channels is  proposed.

 

The determination of velocity distribution in open channel  flows is crucial in many critical engineering problems such as channel  design, calculation of energy losses and sedimentation.  In this  study, velocity distribution is experimentally investigated in a  smooth rectangular open channel.  Wall shear stresses are calculated  using measured local velocities.  Assuming logarithmic velocity  distribution along perpendiculars to a wetted perimeter, dimensionless  wall shear stresses K(I) = tw\bar{t}w and A and B constants  unique to the cross section in the Prandtl equation were calculated.   A correlation for friction coefficient in an open channel is developed  using measured wall shear stress distribution.  An improved relation  for the Manning coefficient on smooth rectangular channels is  proposed.

Makale detayları

Effect of Wall Shear Stress Distribution on Manning Coefficient of Smooth Open Rectangular Channel Flows

Yazarlar: Ahmet BİLGİL

Yayıncı: TUBITAK

Dergi: Turkish Journal of Engineering and Environmental Sciences 2003 Vol.27 Issue 5, pp.305-314

Belge Tipi: Makale

Yayın Tarihi: 4/2003

Belge Dili: Türkçe

Document ID (Org No.): 2000745119

Sıklık: Üç Yıllık

eISSN: 1303-6157

pISSN: 1300-0160

Sayı

Yazarlar:

Ahmet BİLGİL

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 2003 Vol.27 Issue 5, pp.305-314

Belge Tipi:

Makale

Yayın Tarihi:

4/2003

Belge Dili:

Türkçe

Document ID (Org No.):

2000745119

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160