From 4ec94c97879aafef15f7663135745e4ba61e62cf Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Mon, 17 May 2021 00:15:33 +0200
Subject: Extract first public LiterateLB version

---
 tangle/ldc-3d.cu | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 tangle/ldc-3d.cu

(limited to 'tangle/ldc-3d.cu')

diff --git a/tangle/ldc-3d.cu b/tangle/ldc-3d.cu
new file mode 100644
index 0000000..ece1234
--- /dev/null
+++ b/tangle/ldc-3d.cu
@@ -0,0 +1,58 @@
+#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/shear_layer.h"
+
+using T = float;
+using DESCRIPTOR = descriptor::D3Q19;
+
+int main() {
+cudaSetDevice(0);
+
+const descriptor::Cuboid<DESCRIPTOR> cuboid(100, 100, 100);
+Lattice<DESCRIPTOR,T> lattice(cuboid);
+
+CellMaterials<DESCRIPTOR> materials(cuboid, [&cuboid](uint3 p) -> int {
+  if (p.x == 0 || p.x == cuboid.nX-1 || p.y == 0 || p.y == cuboid.nY-1 || p.z == cuboid.nZ-1) {
+    return 2; // boundary cell
+  } else if (p.z == 0) {
+    return 3; // lid cell
+  } else {
+    return 1; // bulk
+  }
+});
+
+auto bulk_mask = materials.mask_of_material(1);
+auto wall_mask = materials.mask_of_material(2);
+auto lid_mask  = materials.mask_of_material(3);
+
+lattice.apply(Operator(InitializeO(), bulk_mask),
+              Operator(InitializeO(), wall_mask),
+              Operator(InitializeO(), lid_mask));
+
+cudaDeviceSynchronize();
+
+auto none = [] __device__ (float3) -> float { return 1; };
+VolumetricExample renderer(cuboid);
+renderer.add<CurlNormS>(lattice, bulk_mask, none);
+renderer.add<ShearLayerVisibilityS>(lattice, bulk_mask, none, make_float3(0,1,0));
+renderer.add<VelocityNormS>(lattice, bulk_mask, none);
+renderer.run([&](std::size_t iStep) {
+  const float tau = 0.56;
+  const float lid = 0.10;
+  
+  lattice.apply(Operator(BgkCollideO(), bulk_mask, tau),
+                Operator(BounceBackO(), wall_mask),
+                Operator(BounceBackMovingWallO(), lid_mask, std::min(iStep*1e-3, 1.0)*lid, 0.f, 0.f));
+  
+  lattice.stream();
+});
+}
-- 
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