[houzhexing]

When combining sixDoF with the Laplacian method to realize the deformation of a wing within an overset mesh according to a specified equation and moving out of water, only the first layer of mesh has deformation. And the wing in the overset does not move with overset. The deformation is set in the 0/pointDisplacement. The codes are following:

FoamFile
{
version 2.0;
format ascii;
class pointVectorField;
object pointDisplacement;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [0 1 0 0 0 0 0];

internalField uniform (0 0 0);

boundaryField
{

LEFT
{
type uniformFixedValue;
uniformValue (0 0 0);
}

RIGHT
{
type uniformFixedValue;
uniformValue (0 0 0);
}

TOP
{
type uniformFixedValue;
uniformValue (0 0 0);
}

BOTTOM
{
type uniformFixedValue;
uniformValue (0 0 0);
}

FRONT
{
type empty;
}

BACK
{
type empty;
}

WING
{
type codedFixedValue;
value uniform (0 0 0);
name wingFlexibleDisp;

code
#{
const scalar t = this->db().time().value();

const pointField& pts = this->patch().localPoints();

vectorField& disp = *this;

scalar f = 1.0; // frequency(Hz)
scalar a = 0.4; // flexibleA(m)
scalar c = 1.0; // chord(m)
scalar h = 0.4; // height(m)
scalar phi = 1.570795; // rad

scalar T = 1.0/f;
scalar t_sw = 0.25*T;

forAll(disp, i)
{
scalar y = pts[i].y();

scalar x0 = h/c;

scalar x;

if (t < t_sw)
{
x = (t / t_sw) * x0;
}
else
{
scalar tp = t-t_sw;

x = h*c*cos(2.0*M_PI*f*tp)-(a/c)*y*y*cos(2.0*M_PI*f*tp+phi);
}

disp[i].x() = x;
disp[i].y() = 0.0;
disp[i].z() = 0.0;
}
#};
}

FRONTANDBACKOVERSET
{
type empty;
}

OVERSET
{
patchType overset;
type zeroGradient;
}

}

// *********//
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object dynamicMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

motionSolverLibs (sixDoFRigidBodyMotion);

dynamicFvMesh dynamicOversetFvMesh;

solver sixDoFRigidBodyMotion;

sixDoFRigidBodyMotionCoeffs
{
patches (WING);
innerDistance 0.0;
outerDistance 10.0;

centreOfMass (0 -0.3 0.05);
velocity (0 3.0 0);

rhoSolid 998.2;
mass 9.562;
g (0 -9.81 0);
momentOfInertia (2.26 0.04 2.24);

report on;
reportToFile on;

accelerationRelaxation 1.0;
accelerationDamping 0.0;

solver
{
type Newmark;
}
）
constraints
{
XOYPlane
{
type sixDoFRigidBodyMotionConstraint;
sixDoFRigidBodyMotionConstraint plane;
normal (0 0 1);
point (0 0 0);
}

ZAxisRotation
{
type sixDoFRigidBodyMotionConstraint;
sixDoFRigidBodyMotionConstraint axis;
axis (0 0 1);
point (0 0 0);
}

YTranslation
{
type sixDoFRigidBodyMotionConstraint;
sixDoFRigidBodyMotionConstraint line;
direction (0 1 0);
point (0 0 0);
}
}

forces
{

gravityCompensation
{
type constantForce;
origin (0 -0.3 0.05);
force (0 93.80322 0);
}
}

displacementLaplacianCoeffs
{
diffusivity inverseDistance (WING);
relaxationFactor 0.5;
}
}

// ************************************************** ********************** //