Extract first public LiterateLB version

1 files changed, 73 insertions, 0 deletions

diff --git a/tangle/nozzle.cu b/tangle/nozzle.cu
new file mode 100644
index 0000000..43217dc
--- /dev/null
+++ b/tangle/nozzle.cu
@@ -0,0 +1,73 @@
+#include <LLBM/base.h>
+#include <LLBM/bulk.h>
+#include <LLBM/boundary.h>
+
+#include "util/render_window.h"
+#include "util/texture.h"
+#include "util/colormap.h"
+
+#include "util/volumetric_example.h"
+#include "sampler/velocity_norm.h"
+#include "sampler/curl_norm.h"
+#include "sampler/q_criterion.h"
+
+using T = float;
+using DESCRIPTOR = descriptor::D3Q19;
+
+int main() {
+cudaSetDevice(0);
+
+const descriptor::Cuboid<DESCRIPTOR> cuboid(448, 64, 64);
+Lattice<DESCRIPTOR,T> lattice(cuboid);
+
+CellMaterials<DESCRIPTOR> materials(cuboid, [&cuboid](uint3 p) -> int {
+  if (p.y == 0 || p.y == cuboid.nY-1 || p.z == 0 || p.z == cuboid.nZ-1) {
+    return 2; // boundary cell
+  } else if (p.x == 0) {
+    return 3; // inflow cell
+  } else if (p.x == cuboid.nX-1) {
+    return 4; // outflow cell
+  } else {
+    return 1; // bulk
+  }
+});
+
+auto obstacle = [cuboid] __host__ __device__ (float3 p) -> float {
+                  float3 q = p - make_float3(cuboid.nX/24.2f, cuboid.nY/2, cuboid.nZ/2);
+                  return sdf::ssub(sdf::sphere(make_float2(q.y,q.z), cuboid.nY/T{9}),
+                                   sdf::box(q, make_float3(cuboid.nX/128,cuboid.nY/2,cuboid.nZ/2)),
+                                   5);
+                };
+materials.sdf(obstacle, 0);
+SignedDistanceBoundary bouzidi(lattice, materials, obstacle, 1, 0);
+
+auto bulk_mask     = materials.mask_of_material(1);
+auto boundary_mask = materials.mask_of_material(2);
+auto inflow_mask   = materials.mask_of_material(3);
+auto outflow_mask  = materials.mask_of_material(4);
+
+lattice.apply(Operator(InitializeO(), bulk_mask),
+              Operator(InitializeO(), boundary_mask),
+              Operator(InitializeO(), inflow_mask),
+              Operator(InitializeO(), outflow_mask));
+
+cudaDeviceSynchronize();
+
+VolumetricExample renderer(cuboid);
+renderer.add<CurlNormS>(lattice, bulk_mask, obstacle);
+renderer.add<QCriterionS>(lattice, bulk_mask, obstacle);
+renderer.add<VelocityNormS>(lattice, bulk_mask, obstacle);
+renderer.run([&](std::size_t iStep) {
+  const float tau = 0.501;
+  const float smagorinsky = 0.1;
+  const float inflow = 0.0075;
+  
+  lattice.apply(Operator(SmagorinskyBgkCollideO(), bulk_mask, tau, smagorinsky),
+                Operator(BounceBackO(), boundary_mask),
+                Operator(EquilibriumVelocityWallO(), inflow_mask, std::min(iStep*1e-4, 1.0)*inflow, WallNormal<1,0,0>()),
+                Operator(EquilibriumDensityWallO(), outflow_mask, 1, WallNormal<-1,0,0>()));
+  lattice.apply<BouzidiO>(bouzidi.getCount(), bouzidi.getConfig());
+  
+  lattice.stream();
+});
+}