unit ?
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 |
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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Thank you very much for your interest, I will try it.
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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 ? |
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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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. |
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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