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Could you please tell me what the units of the parameters are in the example examples/205_multivof/crystal #21

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Moxing529 opened this issue Oct 24, 2024 · 5 comments

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@Moxing529
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Dear Dr. Karnakov,
During the modeling process of examples/205_multivof/crystal
length = 6e-3 width = 1e-3 # main channel width height = 0.1e-3 junction_x = 0.75e-3 narrow_length = 0.42e-3 narrow_width = 0.11e-3 side_inlet_width = 0.055e-3 rounding_r = 0.23e-3
The chip modeling parameters are all on the order of e-3.
However, during the initialization process, brx=0.2, which is clearly larger than the size of the entire chip. May I ask what unit this is in? Thank you very much.
if par.row: conf['init_vf'] = "list" vf = aphros.Geometry() **brx = 0.2** for x in np.arange(wx + rr + brx, lx, 2 * brx): k = 0.98 vf.Box([x, ly / 2, lz / 2], [brx * k, W / 2 * k, H / 2 * k]) with open("b.dat", 'w') as f: f.write(vf.Generate())

@Moxing529
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And may I also ask if the velocity and pressure in this case are in standard international units?

@Moxing529
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The surface tension coefficient between air and water is 0.072, and what does the parameter 72e-3*0.25 mean in the simulation settings?Thank you very much!

@pkarnakov
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The units in gen are SI. But the surface tension was decreased for stability reasons and to reduce the spurios flow.
And I don't recall what brx=0.2 is for, but that code is inactive anyway since par.row is False. (must be some leftovers from development)

@Moxing529
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Haha, alright, thank you, Dr. Karnakov. May I ask what the output pressure unit is?

@pkarnakov
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The output pressure is in Pa.

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