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Old   March 24, 2013, 12:04
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Dear All,

I'm new in Flow-3D.
I work on physical models. In Weirs "free surface".
I have inquire: When we draw the shape in AutoCAD (eg x = 1 m). We open with MiniMagics shows "x = 1000 mm." When we insert the form in Flow-3D shows me the dimension "x = 1000". Knowing i work in the system (SI).
"x = 1000" in Flow-3D, Does this unit in millimeters or meters?
help me please.

Thank you,
Faris
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Old   March 25, 2013, 10:03
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FLOW-3D does not track units, so you just need to make sure that all inputs are in a consistent unit system (e.g. SI).
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Old   March 25, 2013, 15:09
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Thank you very much for your interest, I will try it.
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Old   March 27, 2013, 05:13
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Hi dmilano,

I have entered all the inputs in the system and a consistent unit.
The smaller dimension of the shape is (x = 0.002 m). When we do the mesh, The cell number up to more than 40 million. Is this normal ?
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Old   March 27, 2013, 10:35
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40M is large, but some problems require this many cells - it just depends on the size of the domain and the required cell size. Even so, it is worth double-checking your inputs to make sure that nothing was missed.
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Old   March 31, 2013, 06:08
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Hi dmilano,

I tried several attempts but did not succeed. Simulations stopped after taken a long time and i get an error message "Time-step size < dtmin".
Please if you have time, I send to you a prepin (input file) to investigate and show me the Mistake. Please help me.
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Old   June 25, 2013, 02:24
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this error can have several reasons:
first of all check the manual there is part about troubleshooting.
the consider your mesh, first use a very coarse mesh if it again happen chand the order of solver or ur turbulence models.

good luck
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