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tdetermine translational kinetic energy - slidergrid - grid of elastic sliders … |
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git clone git://src.adamsgaard.dk/slidergrid |
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--- |
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commit 5923f961afa2aca4593b8c4004ae6c5816e7250e |
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parent b7c2f91bf3969f60232019e78e937aaa8d894f1f |
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Author: Anders Damsgaard <[email protected]> |
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Date: Wed, 30 Mar 2016 14:08:04 -0700 |
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determine translational kinetic energy |
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Diffstat: |
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M postprocessing.py | 11 ++++++++++- |
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1 file changed, 10 insertions(+), 1 deletion(-) |
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--- |
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diff --git a/postprocessing.py b/postprocessing.py |
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t@@ -65,7 +65,14 @@ class sgvis: |
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return 0.0 |
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def current_kinetic_energy(self): |
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- return 0.0 |
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+ E_kin = 0.0 |
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+ for idx in np.arange(np.size(self.mass)): |
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+ E_kin += self.slider_linear_kinetic_energy(idx) |
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+ return E_kin |
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+ |
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+ def slider_linear_kinetic_energy(self, idx): |
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+ return 0.5*self.mass[idx] \ |
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+ * np.sqrt(np.dot(self.vel[idx, :], self.vel[idx, :]))**2 |
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def plot_kinetic_energy(self): |
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t = [] |
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t@@ -73,8 +80,10 @@ class sgvis: |
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for filename in os.listdir(self.folder): |
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if 'sliders' in filename \ |
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and '.txt' in filename \ |
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+ and '.pdf' in filename \ |
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and '.png' not in filename: |
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self.read_sliders(filename) |
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+ t.append(self.current_time) |
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E_kin.append(self.current_kinetic_energy) |
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plt.plot(t, E_kin) |
