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Diffstat (limited to 'boltz.cc')
-rw-r--r-- | boltz.cc | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/boltz.cc b/boltz.cc deleted file mode 100644 index 092814e..0000000 --- a/boltz.cc +++ /dev/null @@ -1,115 +0,0 @@ -#include <iostream> -#include <vector> -#include <string> -#include <algorithm> - -#include "lbm.h" -#include "boundary_conditions.h" -#include "box_obstacle.h" - -constexpr std::size_t dimX = 120; -constexpr std::size_t dimY = dimX; - -constexpr double uLid = 0.3; -constexpr double reynolds = 1000; - -constexpr double tau = 3 * uLid * (dimX-1) / reynolds + 0.5; -constexpr double omega = 1. / tau; - -DataCellBuffer pop(dimX, dimY); -FluidBuffer fluid(dimX, dimY); - -std::vector<BoxObstacle> obstacles{ - {20, 20, 40, 40}, - {50, 20, 70, 40}, - {80, 20, 100, 40}, - {20, 50, 40, 70}, - {50, 50, 70, 70}, - {80, 50, 100, 70}, - {20, 80, 40, 100}, - {50, 80, 70, 100}, - {80, 80, 100, 100}, -}; - -void init() { - for ( std::size_t x = 0; x < dimX; ++x ) { - for ( std::size_t y = 0; y < dimY; ++y ) { - fluid.density(x,y) = 1.0; - fluid.velocity(x,y) = { 0.0, 0.0 }; - - static_cast<Cell&>(pop.curr(x,y)).equilibrize( - fluid.density(x,y), fluid.velocity(x,y)); - static_cast<Cell&>(pop.prev(x,y)).equilibrize( - fluid.density(x,y), fluid.velocity(x,y)); - } - } -} - -void computeLbmStep() { - pop.swap(); - - for ( std::size_t x = 0; x < dimX; ++x ) { - for ( std::size_t y = 0; y < dimY; ++y ) { - if ( std::all_of(obstacles.cbegin(), obstacles.cend(), [x, y](const auto& o) { - return !o.isInside(x, y); - }) ) { - streamFluidCell(pop, x, y); - } - } - } - - // straight wall cell bounce back - for ( std::size_t x = 0; x < dimX; ++x ) { - computeZouHeVelocityWallCell(pop, {x, dimY-1}, { 0,-1}, uLid); - } - for ( std::size_t x = 1; x < dimX-1; ++x ) { - computeWallCell(pop, {x, 0}, { 0, 1}); - } - for ( std::size_t y = 1; y < dimY-1; ++y ) { - computeWallCell(pop, {0, y}, { 1, 0}); - computeWallCell(pop, {dimX-1, y}, {-1, 0}); - } - - // edge wall cell bounce back - computeWallCell(pop, {0, 0 }, { 1, 1}); - computeWallCell(pop, {dimX-1, 0 }, {-1, 1}); - - // obstacles - for ( const auto& box : obstacles ) { - box.applyBoundary(pop); - } - - for ( std::size_t x = 0; x < dimX; ++x ) { - for ( std::size_t y = 0; y < dimY; ++y ) { - Cell& cell = static_cast<Cell&>(pop.curr(x,y)); - fluid.density(x,y) = cell.sum(); - fluid.velocity(x,y) = cell.velocity(fluid.density(x,y)); - - if ( std::all_of(obstacles.cbegin(), obstacles.cend(), [x, y](const auto& o) { - return !o.isInside(x, y); - }) ) { - collideFluidCell(omega, pop, fluid, x, y); - } - } - } -} - -int main() { - init(); - - std::cout << "Re: " << reynolds << std::endl; - std::cout << "uLid: " << uLid << std::endl; - std::cout << "tau: " << tau << std::endl; - - for ( std::size_t t = 0; t <= 6000; ++t ) { - computeLbmStep(); - - if ( t % 100 == 0 ) { - std::cout << "."; - std::cout.flush(); - fluid.writeAsVTK("result/data_t" + std::to_string(t) + ".vtk"); - } - } - - std::cout << std::endl; -} |