Mercurial > dive4elements > river
changeset 9121:8675912c7f48
Fixed tkh calculation (sign of an exponent of the critical shields term)
| author | mschaefer |
|---|---|
| date | Tue, 05 Jun 2018 15:37:34 +0200 |
| parents | 2fb72a0aa313 |
| children | b8e7f6becf78 |
| files | artifacts/src/main/java/org/dive4elements/river/artifacts/sinfo/tkhcalculation/TkhCalculator.java |
| diffstat | 1 files changed, 1 insertions(+), 1 deletions(-) [+] |
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--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/sinfo/tkhcalculation/TkhCalculator.java Tue Jun 05 11:44:05 2018 +0200 +++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/sinfo/tkhcalculation/TkhCalculator.java Tue Jun 05 15:37:34 2018 +0200 @@ -209,7 +209,7 @@ final double froude = vm / Math.sqrt(PHYS_G * h); final double partReynolds = Math.sqrt((PHYS_SPECGRAV_S - 1) * PHYS_G * d50) / PHYS_VISCOSITY_NUE * d50; - final double critShields = 0.22 * Math.pow(partReynolds, -0.6) + 0.06 * Math.pow(10, 7.7 * Math.pow(partReynolds, -0.6)); + final double critShields = 0.22 * Math.pow(partReynolds, -0.6) + 0.06 * Math.pow(10, -7.7 * Math.pow(partReynolds, -0.6)); final double critTau = critShields * (PHYS_GRAIN_DENSITY_RHOS - PHYS_WATER_DENSITY_RHO) * PHYS_G * d50; final double tkh = 100 * h * (1 - Math.pow(froude, 2)) / (2 * PHYS_VELOCCOEFF_N * PHYS_FORMCOEFF_ALPHA) * (1 - critTau / tau); // Some regular input values may give a negative calculation result; that is unwanted