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add unit conversion to table pair style

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This commit is contained in:
Axel Kohlmeyer
2020-06-25 04:31:34 -04:00
parent c6b16577f6
commit 2acf71c3e2
5 changed files with 140 additions and 29 deletions
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105
unittest/formats/test_pair_unit_convert.cpp
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@ -140,6 +140,10 @@ TEST_F(PairUnitConvertTest, lj_cut)
lmp->input->one("read_data test_pair_unit_convert.data");
lmp->input->one("pair_style lj/cut 6.0");
lmp->input->one("pair_coeff * * 0.01014286346782117 2.0");
remove("test.table.metal");
lmp->input->one("pair_write 1 1 1000 r 0.1 6.0 test.table.metal lj_1_1");
lmp->input->one("pair_write 1 2 1000 r 0.1 6.0 test.table.metal lj_1_2");
lmp->input->one("pair_write 2 2 1000 r 0.1 6.0 test.table.metal lj_2_2");
lmp->input->one("run 0 post no");
if (!verbose) ::testing::internal::GetCapturedStdout();
@ -158,6 +162,10 @@ TEST_F(PairUnitConvertTest, lj_cut)
lmp->input->one("read_data test_pair_unit_convert.data");
lmp->input->one("pair_style lj/cut 6.0");
lmp->input->one("pair_coeff * * 0.2339 2.0");
remove("test.table.real");
lmp->input->one("pair_write 1 1 1000 r 0.1 6.0 test.table.real lj_1_1");
lmp->input->one("pair_write 1 2 1000 r 0.1 6.0 test.table.real lj_1_2");
lmp->input->one("pair_write 2 2 1000 r 0.1 6.0 test.table.real lj_2_2");
lmp->input->one("run 0 post no");
if (!verbose) ::testing::internal::GetCapturedStdout();
@ -216,6 +224,101 @@ TEST_F(PairUnitConvertTest, sw)
EXPECT_NEAR(ev_convert * fold[i][j], f[i][j], fabs(f[i][j] * rel_error));
}
TEST_F(PairUnitConvertTest, table_metal2real)
{
// check if the prerequisite pair style is available
if (!info->has_style("pair", "table")) GTEST_SKIP();
if (!verbose) ::testing::internal::CaptureStdout();
lmp->input->one("units metal");
lmp->input->one("read_data test_pair_unit_convert.data");
lmp->input->one("pair_style table linear 1000");
lmp->input->one("pair_coeff 1 1 test.table.metal lj_1_1");
lmp->input->one("pair_coeff 1 2 test.table.metal lj_1_2");
lmp->input->one("pair_coeff 2 2 test.table.metal lj_2_2");
lmp->input->one("run 0 post no");
if (!verbose) ::testing::internal::GetCapturedStdout();
// copy pressure, energy, and force from first step
double pold;
lmp->output->thermo->evaluate_keyword("press", &pold);
double eold = lmp->force->pair->eng_vdwl + lmp->force->pair->eng_coul;
double **f = lmp->atom->f;
for (int i = 0; i < 4; ++i)
for (int j = 0; j < 3; ++j)
fold[i][j] = f[i][j];
if (!verbose) ::testing::internal::CaptureStdout();
lmp->input->one("clear");
lmp->input->one("units real");
lmp->input->one("read_data test_pair_unit_convert.data");
lmp->input->one("pair_style table linear 1000");
lmp->input->one("pair_coeff 1 1 test.table.metal lj_1_1");
lmp->input->one("pair_coeff 1 2 test.table.metal lj_1_2");
lmp->input->one("pair_coeff 2 2 test.table.metal lj_2_2");
lmp->input->one("run 0 post no");
if (!verbose) ::testing::internal::GetCapturedStdout();
double pnew;
lmp->output->thermo->evaluate_keyword("press", &pnew);
EXPECT_NEAR(pold, p_convert * pnew, fabs(pnew * rel_error));
double enew = lmp->force->pair->eng_vdwl + lmp->force->pair->eng_coul;
EXPECT_NEAR(ev_convert * eold, enew, fabs(enew * rel_error));
f = lmp->atom->f;
for (int i = 0; i < 4; ++i)
for (int j = 0; j < 3; ++j)
EXPECT_NEAR(ev_convert * fold[i][j], f[i][j], fabs(f[i][j] * rel_error));
}
TEST_F(PairUnitConvertTest, table_real2metal)
{
// check if the prerequisite pair style is available
if (!info->has_style("pair", "table")) GTEST_SKIP();
if (!verbose) ::testing::internal::CaptureStdout();
lmp->input->one("units real");
lmp->input->one("read_data test_pair_unit_convert.data");
lmp->input->one("pair_style table linear 1000");
lmp->input->one("pair_coeff 1 1 test.table.real lj_1_1");
lmp->input->one("pair_coeff 1 2 test.table.real lj_1_2");
lmp->input->one("pair_coeff 2 2 test.table.real lj_2_2");
lmp->input->one("run 0 post no");
if (!verbose) ::testing::internal::GetCapturedStdout();
// copy pressure, energy, and force from first step
double pold;
lmp->output->thermo->evaluate_keyword("press", &pold);
double eold = lmp->force->pair->eng_vdwl + lmp->force->pair->eng_coul;
double **f = lmp->atom->f;
for (int i = 0; i < 4; ++i)
for (int j = 0; j < 3; ++j)
fold[i][j] = f[i][j];
if (!verbose) ::testing::internal::CaptureStdout();
lmp->input->one("clear");
lmp->input->one("units metal");
lmp->input->one("read_data test_pair_unit_convert.data");
lmp->input->one("pair_style table linear 1000");
lmp->input->one("pair_coeff 1 1 test.table.real lj_1_1");
lmp->input->one("pair_coeff 1 2 test.table.real lj_1_2");
lmp->input->one("pair_coeff 2 2 test.table.real lj_2_2");
lmp->input->one("run 0 post no");
if (!verbose) ::testing::internal::GetCapturedStdout();
double pnew;
lmp->output->thermo->evaluate_keyword("press", &pnew);
EXPECT_NEAR(pold, 1.0/p_convert * pnew, fabs(pnew * rel_error));
double enew = lmp->force->pair->eng_vdwl + lmp->force->pair->eng_coul;
EXPECT_NEAR(1.0/ev_convert * eold, enew, fabs(enew * rel_error));
f = lmp->atom->f;
for (int i = 0; i < 4; ++i)
for (int j = 0; j < 3; ++j)
EXPECT_NEAR(1.0/ev_convert * fold[i][j], f[i][j],
fabs(f[i][j] * rel_error));
}
TEST_F(PairUnitConvertTest, tersoff)
{
// check if the prerequisite pair style is available
@ -539,5 +642,7 @@ int main(int argc, char **argv)
int rv = RUN_ALL_TESTS();
MPI_Finalize();
remove("test.table.metal");
remove("test.table.real");
return rv;
}