hydrodynamics::kf2012::Inflow< T > Struct Template Reference

The inflow on a panel: its speed, direction and angle to the normal.

#include <KF2012Common.h>

Public Attributes
T	speed
	|U|, m/s.
T	direction [3]
	U-hat = U / max(|U|, kMinSpeed).
T	cosTheta
	cos(theta) = |U-hat . n|, in [0, 1].
T	theta
	rad, in [0, pi/2].
T	liftBasis [3]

Member Data Documentation

liftBasis

template<class T >

T hydrodynamics::kf2012::Inflow< T >::liftBasis[3]

sin(theta) cos(theta) L-hat = (U-hat . n) n - (U-hat . n)^2 U-hat.

L-hat is the lift direction of KF2012 Fig. 3 (p. 221), normalize((U-hat x n) x U-hat) with n flipped into the half-space of U (Eq. 20, p. 235); it satisfies Eq. 2 with the tangent of Eq. 21. Every lift harmonic sin(2k theta) carries the factor sin(theta) cos(theta), so the lift force is this vector times a polynomial in cos(theta). That form needs no epsilon in the tangent direction and no sign of U . n, and is smooth at theta = 0 and theta = pi/2, where L-hat itself is undefined or flips.

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The documentation for this struct was generated from the following file:

• webfhsim/reloadrepos/fhsim_marine_elements/src/hydrodynamics/KF2012Common.h