GfsSolid

From Gerris

GfsSolid is used to define solid boundaries.

The syntax in parameter files is:

GfsSolid [ GfsSurface ]

If GfsSurface is defined implicitly, by convention the fluid domain is the locus of points for which the implicit function takes positive values.

Examples

• B\'enard--von K\'arm\'an Vortex Street for flow around a cylinder at Re=160

  Solid (x*x + y*y - 0.0625*0.0625)

• Vortex street around a "heated" cylinder

  Solid (x*x + y*y - 0.0625*0.0625)

• Boussinesq flow generated by a heated cylinder

  Solid (ellipse(0.,-0.15,1./16.,1./16.))

• Turbulent air flow around RV Tangaroa

  Solid tangaroa.gts

• Lunar tides in Cook Strait, New Zealand

    Solid bath.gts

• Air-water flow around a Series 60 cargo ship

    Solid S60-scaled.gts { ty = 0.5 }

• Convergence of the Poisson solver with solid boundaries

  Solid (ellipse (0, 0, 0.25, 0.25))

• Star-shaped solid boundary with refinement

    Solid ({
            double dr = 0.1;
            double theta = atan2 (y, x);
            double radius = 0.79*(0.45 - dr + dr*cos (6.*theta));
            return x*x + y*y - radius*radius;
          })

• Star-shaped solid boundary

    Solid ({
            double dr = 0.1;
            double theta = atan2 (y, x);
            double radius = 0.79*(0.45 - dr + dr*cos (6.*theta));
            return x*x + y*y - radius*radius;
          })

• Poisson solution in a dumbbell-shaped domain

  Solid dumbell.gts

• Potential flow around a sphere

    Solid (ellipse (0., 0., A0, A0))

• Viscous flow past a sphere

    Solid (ellipse (0., 0., A0, A0))

• Mass conservation with solid boundary

    Solid (ellipse (0., 0., 0.05, 0.05))

• Creeping Couette flow of Generalised Newtonian fluids

  Solid (ellipse (0,0,0.25,0.25)) { flip = 1 scale = 1.9999 }

  Solid (ellipse (0,0,0.25,0.25))

• Hydrostatic balance with solid boundaries and viscosity

    Solid (ellipse(0.,0.,0.24,0.24))

• Hydrostatic balance with quadratic pressure profile

    Solid (ellipse(0.,0.,0.24,0.24))

• Convergence of a potential flow solution

    Solid (ellipse (0.25, 0.25, 0.1, 0.1))

    Solid (ellipse (-0.25, 0.125, 0.15, 0.1))

    Solid (ellipse (0., -0.25, 0.2, 0.1))

• Flow through a divergent channel

    Solid (0.125 - channel (x) - y) { scale = 4 tx = 1.5 }

    Solid (y + 0.125 - channel (x)) { scale = 4 tx = 1.5 }

• Potential flow around a thin plate

  Solid (cube(0,0,0,0.5)) { sy = 0.06251 tx = 0.031249 ty = -0.015 }

• Coastally-trapped waves

  Solid (- ellipse (0, 0, 0.25, 0.25)) { scale = 1.999 }

• Coastally-trapped waves with adaptive refinement

  Solid (- ellipse (0, 0, 0.25, 0.25)) { scale = 1.999 }

• Gravity waves in a realistic ocean basin

    Solid bath.gts