def test2(self): #not completed convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 149.5e6 | units.km) instance = BHTree(convert_nbody) #instance.dt_dia = 1 instance.parameters.epsilon_squared = 0.001 | units.AU**2 #instance.timestep = 0.0001 #instance.use_self_gravity = 0 instance.commit_parameters() stars = datamodel.Stars(2) sun = stars[0] sun.mass = units.MSun(1.0) sun.position = units.m(numpy.array((0.0, 0.0, 0.0))) sun.velocity = units.ms(numpy.array((0.0, 0.0, 0.0))) sun.radius = units.RSun(1.0) earth = stars[1] earth.mass = units.kg(5.9736e24) earth.radius = units.km(6371) earth.position = units.km(numpy.array((149.5e6, 0.0, 0.0))) earth.velocity = units.ms(numpy.array((0.0, 29800, 0.0))) instance.particles.add_particles(stars) instance.commit_particles() self.assertAlmostRelativeEquals(sun.radius, instance.particles[0].radius) for x in range(1, 2000, 10): instance.evolve_model(x | units.day) instance.particles.copy_values_of_all_attributes_to(stars) stars.savepoint() if HAS_MATPLOTLIB: figure = pyplot.figure() plot = figure.add_subplot(1, 1, 1) x_points = earth.get_timeline_of_attribute("x") y_points = earth.get_timeline_of_attribute("y") x_points_in_AU = map(lambda (t, x): x.value_in(units.AU), x_points) y_points_in_AU = map(lambda (t, x): x.value_in(units.AU), y_points) plot.scatter(x_points_in_AU, y_points_in_AU, color="b", marker='o') plot.set_xlim(-1.5, 1.5) plot.set_ylim(-1.5, 1.5) test_results_path = self.get_path_to_results() output_file = os.path.join(test_results_path, "bhtree-earth-sun.svg") figure.savefig(output_file) instance.cleanup_code() instance.stop()
def test2(self): #not completed convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 149.5e6 | units.km) instance = FDPS(convert_nbody) #instance.dt_dia = 1 instance.parameters.epsilon_squared = 0.001 | units.AU**2 #instance.timestep = 0.0001 #instance.use_self_gravity = 0 instance.commit_parameters() stars = datamodel.Stars(2) sun = stars[0] sun.mass = units.MSun(1.0) sun.position = units.m(numpy.array((0.0,0.0,0.0))) sun.velocity = units.ms(numpy.array((0.0,0.0,0.0))) sun.radius = units.RSun(1.0) earth = stars[1] earth.mass = units.kg(5.9736e24) earth.radius = units.km(6371) earth.position = units.km(numpy.array((149.5e6,0.0,0.0))) earth.velocity = units.ms(numpy.array((0.0,29800,0.0))) instance.particles.add_particles(stars) instance.commit_particles() self.assertAlmostRelativeEquals(sun.radius, instance.particles[0].radius) for x in range(1,2000,10): instance.evolve_model(x | units.day) instance.particles.copy_values_of_all_attributes_to(stars) stars.savepoint() if HAS_MATPLOTLIB: figure = pyplot.figure() plot = figure.add_subplot(1,1,1) x_points = earth.get_timeline_of_attribute("x") y_points = earth.get_timeline_of_attribute("y") x_points_in_AU = map(lambda (t,x) : x.value_in(units.AU), x_points) y_points_in_AU = map(lambda (t,x) : x.value_in(units.AU), y_points) plot.scatter(x_points_in_AU,y_points_in_AU, color = "b", marker = 'o') plot.set_xlim(-1.5, 1.5) plot.set_ylim(-1.5, 1.5) test_results_path = self.get_path_to_results() output_file = os.path.join(test_results_path, "fdps-earth-sun.svg") figure.savefig(output_file) instance.cleanup_code() instance.stop()
def new_system_sun_and_earth(self): result = Particles(2) sun = result[0] sun.mass = units.MSun(1.0) sun.position = units.m(numpy.array((0.0, 0.0, 0.0))) sun.velocity = units.ms(numpy.array((0.0, 0.0, 0.0))) sun.radius = units.RSun(1.0) earth = result[1] earth.mass = units.kg(5.9736e24) earth.radius = units.km(6371) earth.position = units.km(numpy.array((149.5e6, 0.0, 0.0))) earth.velocity = units.ms(numpy.array((0.0, 29800, 0.0))) return result
def new_system_sun_and_earth(self): result = Particles(2) sun = result[0] sun.mass = units.MSun(1.0) sun.position = units.m(numpy.array((0.0,0.0,0.0))) sun.velocity = units.ms(numpy.array((0.0,0.0,0.0))) sun.radius = units.RSun(1.0) earth = result[1] earth.mass = units.kg(5.9736e24) earth.radius = units.km(6371) earth.position = units.km(numpy.array((149.5e6,0.0,0.0))) earth.velocity = units.ms(numpy.array((0.0,29800,0.0))) return result
def new_system_of_sun_and_earth(self): stars = datamodel.Stars(2) sun = stars[0] sun.mass = units.MSun(1.0) sun.position = units.m(numpy.array((0.0,0.0,0.0))) sun.velocity = units.ms(numpy.array((0.0,0.0,0.0))) sun.radius = units.RSun(1.0) earth = stars[1] earth.mass = units.kg(5.9736e24) earth.radius = units.km(6371) earth.position = units.km(numpy.array((149.5e6,0.0,0.0))) earth.velocity = units.ms(numpy.array((0.0,29800,0.0))) return stars
def new_system_of_sun_and_earth(self): stars = datamodel.Stars(2) sun = stars[0] sun.mass = units.MSun(1.0) sun.position = units.m(np.array((0.0, 0.0, 0.0))) sun.velocity = units.ms(np.array((0.0, 0.0, 0.0))) sun.radius = units.RSun(1.0) earth = stars[1] earth.mass = units.kg(5.9736e24) earth.radius = units.km(6371) earth.position = units.km(np.array((149.5e6, 0.0, 0.0))) earth.velocity = units.ms(np.array((0.0, 29800, 0.0))) return stars
def __init__(self): self.Sun = LoadStar('sun') self.Sun.mass = units.MSun(1.0) self.Sun.radius = units.RSun(1.0) self.Mercury = LoadStar('mercury') self.Mercury.mass = units.kg(3.302e23) self.Mercury.radius = units.km(2440) self.Venus = LoadStar('venus') self.Venus.mass = units.kg(48.685e23) self.Venus.radius = units.km(6051.8) self.Earth = LoadStar('earth') self.Earth.mass = units.kg(5.9736e24) self.Earth.radius = units.km(6371) self.Moon = LoadStar('moon') self.Moon.mass = units.kg(7.35e22) self.Moon.radius = units.km(1738) self.Mars = LoadStar('mars') self.Mars.mass = units.kg(6.4185e23) self.Mars.radius = units.km(3389.9) self.Jupiter = LoadStar('jupiter') self.Jupiter.mass = units.kg(1898.13e24) self.Jupiter.radius = units.km(71492) #self.Jupiter.radius = units.km(0.000001) self.Saturn = LoadStar('saturn') self.Saturn.mass = units.kg(5.68319e26) self.Saturn.radius = units.km(58232) self.Uranus = LoadStar('uranus') self.Uranus.mass = units.kg(86.8103e24) self.Uranus.radius = units.km(26000) self.Neptune = LoadStar('neptune') self.Neptune.mass = units.kg(102.41e24) self.Neptune.radius = units.km(25000) self.VoyagerI = LoadStar('voyagerI') self.VoyagerI.mass = units.kg(500) self.VoyagerI.radius = units.m(20) self.VoyagerII = LoadStar('voyagerII') self.VoyagerII.mass = units.kg(1000) self.VoyagerII.radius = units.m(20)
def test16(self): convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 149.5e6 | units.km) smalln = SmallN(convert_nbody) smalln.initialize_code() smalln.dt_dia = 5000 stars = self.new_system_of_sun_and_earth() moon = datamodel.Particle() moon.mass = units.kg(7.3477e22) moon.radius = units.km(1737.10) moon.position = units.km(numpy.array((149.5e6 + 384.399 ,0.0,0.0))) moon.velocity = units.ms(numpy.array((0.0,29800 + 1022,0.0))) stars.add_particle(moon) earth = stars[1] smalln.particles.add_particles(stars) smalln.evolve_model(365.0 | units.day) smalln.update_particle_tree() smalln.update_particle_set() self.assertEquals(len(smalln.particles), 5) self.assertEarthAndMoonWasDetectedAsBinary(smalln.particles, stars) inmemory = smalln.particles.copy() self.assertEarthAndMoonWasDetectedAsBinary(inmemory, stars) test_results_path = self.get_path_to_results() output_file = os.path.join(test_results_path, "newsmalln-test16.hdf5") if os.path.exists(output_file): os.remove(output_file) io.write_set_to_file(smalln.particles, output_file, "hdf5") fromfile = io.read_set_from_file(output_file, "hdf5") self.assertEarthAndMoonWasDetectedAsBinary(fromfile, stars)
def test16(self): convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 149.5e6 | units.km) smalln = SmallN(convert_nbody) smalln.initialize_code() smalln.dt_dia = 5000 stars = self.new_system_of_sun_and_earth() moon = datamodel.Particle() moon.mass = units.kg(7.3477e22) moon.radius = units.km(1737.10) moon.position = units.km(numpy.array((149.5e6 + 384.399, 0.0, 0.0))) moon.velocity = units.ms(numpy.array((0.0, 29800 + 1022, 0.0))) stars.add_particle(moon) earth = stars[1] smalln.particles.add_particles(stars) smalln.evolve_model(365.0 | units.day) smalln.update_particle_tree() smalln.update_particle_set() self.assertEqual(len(smalln.particles), 5) self.assertEarthAndMoonWasDetectedAsBinary(smalln.particles, stars) inmemory = smalln.particles.copy() self.assertEarthAndMoonWasDetectedAsBinary(inmemory, stars) test_results_path = self.get_path_to_results() output_file = os.path.join(test_results_path, "newsmalln-test16.hdf5") if os.path.exists(output_file): os.remove(output_file) io.write_set_to_file(smalln.particles, output_file, "hdf5") fromfile = io.read_set_from_file(output_file, "hdf5") self.assertEarthAndMoonWasDetectedAsBinary(fromfile, stars) smalln.stop()
def new_system_of_sun_and_earth_and_moon(self): stars = datamodel.Stars(3) sun = stars[0] sun.mass = units.MSun(1.0) sun.position = units.m(numpy.array((0.0, 0.0, 0.0))) sun.velocity = units.ms(numpy.array((0.0, 0.0, 0.0))) sun.radius = units.RSun(1.0) earth = stars[1] earth.mass = units.kg(5.9736e24) earth.radius = units.km(6371) earth.position = units.km(numpy.array((149.5e6, 0.0, 0.0))) earth.velocity = units.ms(numpy.array((0.0, 29800, 0.0))) moon = stars[2] moon.mass = units.kg(7.3477e22) moon.radius = units.km(1737.10) moon.position = units.km(numpy.array((149.5e6 + 384399.0, 0.0, 0.0))) moon.velocity = ([0.0, 1.022, 0] | units.km / units.s) + earth.velocity return stars
def new_system_of_sun_and_earth_and_moon(self): stars = datamodel.Stars(3) sun = stars[0] sun.mass = units.MSun(1.0) sun.position = units.m(numpy.array((0.0,0.0,0.0))) sun.velocity = units.ms(numpy.array((0.0,0.0,0.0))) sun.radius = units.RSun(1.0) earth = stars[1] earth.mass = units.kg(5.9736e24) earth.radius = units.km(6371) earth.position = units.km(numpy.array((149.5e6,0.0,0.0))) earth.velocity = units.ms(numpy.array((0.0,29800,0.0))) moon = stars[2] moon.mass = units.kg(7.3477e22 ) moon.radius = units.km(1737.10) moon.position = units.km(numpy.array((149.5e6 + 384399.0 ,0.0,0.0))) moon.velocity = ([0.0,1.022,0] | units.km/units.s) + earth.velocity return stars
def generate_dust(dust): #assuming two AU sphere n_particles = len(dust) initial_pos = units.AU(20.0 * (np.random.random([n_particles, 3]) - 0.5)) initial_pos[::, 2] *= 0.001 dust.position = initial_pos dust.velocity = rotate(dust.position, 0, 0, 0.5 * 3.1415) #dust.velocity = np.zeros([n_particles, 3])|units.AUd dust.mass = 100.0 * units.kg(np.ones(n_particles)) dust.radius = 3000 * units.km(np.ones(n_particles)) remove_outershell(dust) remove_core_dust(dust)
def test1(self): convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 149.5e6 | units.km) instance = BHTree(convert_nbody) instance.parameters.epsilon_squared = 0.001 | units.AU**2 stars = datamodel.Stars(2) sun = stars[0] sun.mass = units.MSun(1.0) sun.position = [0.0, 0.0, 0.0] | units.m sun.velocity = [0.0, 0.0, 0.0] | units.ms sun.radius = units.RSun(1.0) earth = stars[1] earth.mass = units.kg(5.9736e24) earth.radius = units.km(6371) earth.position = [149.5e6, 0.0, 0.0] | units.km earth.velocity = [0.0, 29800, 0.0] | units.ms #instance.particles.add_particles(stars) instance.particles.add_particles(stars) postion_at_start = earth.position.value_in(units.AU)[0] instance.evolve_model(365.0 | units.day) instance.particles.copy_values_of_all_attributes_to(stars) postion_after_full_rotation = earth.position.value_in(units.AU)[0] self.assertAlmostEqual(postion_at_start, postion_after_full_rotation, 3) instance.evolve_model(365.0 + (365.0 / 2) | units.day) instance.particles.copy_values_of_all_attributes_to(stars) postion_after_half_a_rotation = earth.position.value_in(units.AU)[0] self.assertAlmostEqual(-postion_at_start, postion_after_half_a_rotation, 2) instance.evolve_model(365.0 + (365.0 / 2) + (365.0 / 4) | units.day) instance.particles.copy_values_of_all_attributes_to(stars) postion_after_half_a_rotation = earth.position.value_in(units.AU)[1] self.assertAlmostEqual(-postion_at_start, postion_after_half_a_rotation, 1) instance.cleanup_code() instance.stop()
def test1(self): convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 149.5e6 | units.km) instance = FDPS(convert_nbody) instance.parameters.epsilon_squared = 0.001 | units.AU**2 stars = datamodel.Stars(2) sun = stars[0] sun.mass = units.MSun(1.0) sun.position = [0.0,0.0,0.0] | units.m sun.velocity = [0.0,0.0,0.0] | units.ms sun.radius = units.RSun(1.0) earth = stars[1] earth.mass = units.kg(5.9736e24) earth.radius = units.km(6371) earth.position = [149.5e6, 0.0, 0.0] | units.km earth.velocity = [0.0, 29800, 0.0] | units.ms #instance.particles.add_particles(stars) instance.particles.add_particles(stars) postion_at_start = earth.position.value_in(units.AU)[0] instance.evolve_model(365.0 | units.day) instance.particles.copy_values_of_all_attributes_to(stars) postion_after_full_rotation = earth.position.value_in(units.AU)[0] self.assertAlmostEqual(postion_at_start, postion_after_full_rotation, 3) instance.evolve_model(365.0 + (365.0 / 2) | units.day) instance.particles.copy_values_of_all_attributes_to(stars) postion_after_half_a_rotation = earth.position.value_in(units.AU)[0] self.assertAlmostEqual(-postion_at_start, postion_after_half_a_rotation, 2) instance.evolve_model(365.0 + (365.0 / 2) + (365.0 / 4) | units.day) instance.particles.copy_values_of_all_attributes_to(stars) postion_after_half_a_rotation = earth.position.value_in(units.AU)[1] self.assertAlmostEqual(-postion_at_start, postion_after_half_a_rotation, 1) instance.cleanup_code() instance.stop()
def setup_solar_system(self): convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 149.5e6 | units.km) stars = datamodel.Stars(8) sun = stars[0] sun.mass = units.MSun(1.0) sun.position = units.AU(array((0.0,0.0,0.0))) sun.velocity = units.AUd(array((0.0,0.0,0.0))) sun.radius = units.RSun(1.0) mercury = stars[1] mercury.mass = units.kg( 3.302e23) mercury.radius = units.km(2440) mercury.position = units.AU(array((-1.812507519383936E-01, -4.238556570722329E-01, -1.858336536398257E-02))) mercury.velocity = units.AUd(array((2.028905659997442E-02, -9.482619060967475E-03, -2.636707283074494E-03))) venus = stars[2] venus.mass = units.kg(48.685e23) venus.radius = units.km(6051.8) venus.position = units.AU(array((7.174859394658725E-01, -9.118094489213757E-02, -4.286369239375957E-02))) venus.velocity = units.AUd(array((2.569149540621095E-03, 1.995467986481682E-02, 1.246915402703626E-04))) earth = stars[3] earth.mass = units.kg(5.9736e24) earth.radius = units.km(6371) earth.position = units.AU(array(( 4.152751345538410E-01, 8.988236789078493E-01, -4.821560120168533E-05))) earth.velocity = units.AUd(array(( -1.588315644843389E-02, 7.210443860976745E-03, -1.350251461569625E-07))) moon = stars[4] moon.mass = units.kg(7.35e22) moon.radius = units.km(1738) moon.position = units.AU(array(( 4.138191074397691E-01, 8.965602570292573E-01, -2.762446418149536E-04))) moon.velocity = units.AUd(array(( -1.541527312550390E-02, 6.894586206029982E-03, 1.223837010915995E-05))) mars = stars[5] mars.mass = units.kg(6.4185e23) mars.radius = units.km(3389.9) mars.position = units.AU(array(( -5.350147323170708E-01, -1.400272441929516E+00, -1.637545552747233E-02))) mars.velocity = units.AUd(array(( 1.360625065710822E-02, -3.765876077406818E-03, -4.130340644254660E-04))) jupiter = stars[6] jupiter.mass = units.kg(1898.13e24) jupiter.radius = units.km(71492) jupiter.position = units.AU(array(( 2.503092399973117E+00, -4.468134118102924E+00, -3.752173268244928E-02))) jupiter.velocity = units.AUd(array(( 6.490840561446090E-03, 4.046895067472646E-03, -1.620422227298534E-04))) saturn = stars[7] saturn.mass = units.kg(5.68319e26 ) saturn.radius = units.km(58232) saturn.position = units.AU(array(( -9.023156820924056E+00, 2.468810475231705E+00, 3.161126539154331E-01))) saturn.velocity = units.AUd(array(( -1.769097295887704E-03, -5.393257979873611E-03, 1.639859191780030E-04 ))) dist = earth.position - moon.position print "distance vector"+str(dist) print "distance %s\n" % (dot(dist,dist)**0.5).as_quantity_in(units.m)#(dist*dist).sum()**0.5 velo = moon.velocity-earth.velocity print "orb velocity %s\n" % (dot(velo,velo)**0.5).as_quantity_in(units.m/units.s) return stars
if __name__ == "__main__": nstars = 1 #int(sys.argv[1]) workers = 1 #int(sys.argv[2]) method = 'hermite' # sys.argv[3] print nstars seed = None stars = datamodel.Stars(3) earth = stars[0] earth.mass = units.kg(5.9736e24) earth.position = units.m(np.array((0.0, 0.0, 0.0))) earth.velocity = units.ms(np.array((0.0, 0.0, 0.0))) earth.radius = units.km(6371) sat_one = stars[1] sat_one.mass = units.kg(1000) sat_one.radius = units.m(10) sat_one.position = units.km(np.array((6371 + 242, 0.0, 0.0))) sat_one.velocity = units.ms(np.array((0.0, 27359 / 3.6, 0.0))) sat_two = stars[2] sat_two.mass = units.kg(1000) sat_two.radius = units.m(10) sat_two.position = units.km(np.array((6371 + 242, 100.0, 0.0))) sat_two.velocity = units.ms(np.array((0.0, 27359 / 3.6, 0.0))) convert_nbody = nbody_system.nbody_to_si(5.9736e24 | units.kg, 6371 | units.km)