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March 1, 2006, 04:24
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Time step calculation
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#1 |
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Guest
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Dear all How can we calculate the time stem for a case involving both convection, diffusion buoyancy and combustion. Thank you
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March 1, 2006, 08:27
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Re: Time step calculation
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#2 |
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Guest
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Physically, determining the dominant process, for example,
convection -> delta_t approx delta_x / Vel diffusion -> delta_t approx delta_x deltaX / (2 diffCoef.) ... and so on, the smallest delta_t is which your need to use. Mathematically, you can use stability analysis, e.g, Matrix method or Von Neumann's, but it much more difficult depending on the problem. |
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