WallFriction Namespace Reference

Functions
Real	DarcyFrictionFactor (const Real &f_F)
	Computes Darcy friction factor from Fanning friction factor. More...
ADReal	DarcyFrictionFactor (const ADReal &f_F)
Real	FanningFrictionFactorChurchill (Real Re, Real roughness, Real D_h)
	Computes Fanning friction factor using Churchill correlation. More...
ADReal	FanningFrictionFactorChurchill (ADReal Re, ADReal roughness, ADReal D_h)
template<typename T1 , typename T2 , typename T3 , typename T4 , typename T5 , typename T6 >
auto	FanningFrictionFactorCheng (const T1 &Re, const T2 &a, const T3 &b, const T4 &c, const T5 &n, const T6 &PoD)
	Computes Fanning friction factor using Cheng-Todreas correlation. More...

Function Documentation

DarcyFrictionFactor() [1/2]

Real WallFriction::DarcyFrictionFactor

(

const Real &

f_F

)

Computes Darcy friction factor from Fanning friction factor.

Parameters

[in]

f_F

Fanning friction factor

Definition at line 18 of file WallFrictionModels.C.

Referenced by ADWallFrictionChengMaterial::computeQpProperties(), ADWallFrictionChurchillMaterial::computeQpProperties(), WallFrictionChurchillMaterial::computeQpProperties(), and TEST().

{
  return 4 * f_F;
}

DarcyFrictionFactor() [2/2]

ADReal WallFriction::DarcyFrictionFactor

(

const ADReal &

f_F

)

Definition at line 24 of file WallFrictionModels.C.

{
  return 4 * f_F;
}

FanningFrictionFactorCheng()

template<typename T1 , typename T2 , typename T3 , typename T4 , typename T5 , typename T6 >

auto WallFriction::FanningFrictionFactorCheng	(	const T1 &	Re,
		const T2 &	a,
		const T3 &	b,
		const T4 &	c,
		const T5 &	n,
		const T6 &	PoD
	)

Computes Fanning friction factor using Cheng-Todreas correlation.

Parameters

Re	Reynolds number
a	Correlation constant
b	Correlation constant
c	Correlation constant
n	Correlation constant
PoD	Pitch-to-diameter ratio

Definition at line 51 of file WallFrictionModels.h.

Referenced by ADWallFrictionChengMaterial::computeQpProperties().

{
  using std::pow, std::max;
  return (a + b * (PoD - 1) + c * pow(PoD - 1, 2)) / pow(max(Re, 10.0), n);
}

FanningFrictionFactorChurchill() [1/2]

Real WallFriction::FanningFrictionFactorChurchill	(	Real	Re,
		Real	roughness,
		Real	D_h
	)

Computes Fanning friction factor using Churchill correlation.

Parameters

Re	Reynolds number
roughness	The roughness of the surface
D_h	Hydraulic diameter

Definition at line 30 of file WallFrictionModels.C.

Referenced by ADWallFrictionChurchillMaterial::computeQpProperties(), WallFrictionChurchillMaterial::computeQpProperties(), and TEST().

{
  Real Re_limit = std::max(Re, 10.0);

  Real a =
      std::pow(2.457 * std::log(1.0 / (std::pow(7.0 / Re_limit, 0.9) + 0.27 * roughness / Dh)), 16);
  Real b = std::pow(3.753e4 / Re_limit, 16);
  return 2.0 * std::pow(std::pow(8.0 / Re_limit, 12) + 1.0 / std::pow(a + b, 1.5), 1.0 / 12.0);
}

FanningFrictionFactorChurchill() [2/2]

ADReal WallFriction::FanningFrictionFactorChurchill	(	ADReal	Re,
		ADReal	roughness,
		ADReal	D_h
	)

Definition at line 41 of file WallFrictionModels.C.

{
  using std::max, std::pow, std::log;

  ADReal Re_limit = max(Re, 10.0);

  ADReal a = pow(2.457 * log(1.0 / (pow(7.0 / Re_limit, 0.9) + 0.27 * roughness / Dh)), 16);
  ADReal b = pow(3.753e4 / Re_limit, 16);
  return 2.0 * pow(pow(8.0 / Re_limit, 12) + 1.0 / pow(a + b, 1.5), 1.0 / 12.0);
}