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choice of time step in implicit numerical schemes |
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May 18, 2020, 00:01
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choice of time step in implicit numerical schemes
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#1 |
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New Member
Kuldeep Singh Yadav
Join Date: May 2020
Posts: 2
Rep Power: 0  |
Can one choose time step smaller than the spatial grid size?
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May 18, 2020, 03:08
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#2 | |
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Senior Member
Arjun
Join Date: Mar 2009
Location: Nurenberg, Germany
Posts: 1,274
Rep Power: 34 |
Quote:
They are different units and do not compare. Its like asking can I lift weight smaller than 300K . |
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May 18, 2020, 03:15
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#3 | |
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New Member
Kuldeep Singh Yadav
Join Date: May 2020
Posts: 2
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Quote:
Ofcourse they have different units but mind explicit scheme and some implicit schemes as well which produce oscillations with such choice of time step mentioned in question, for example Crank-Nicolson scheme. |
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May 18, 2020, 03:51
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#4 | |
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Senior Member
Arjun
Join Date: Mar 2009
Location: Nurenberg, Germany
Posts: 1,274
Rep Power: 34 |
Quote:
So basically you are talking about Courant dependency. About how these schemes behave Prof Peric has note in his book. I would rather refer you there. |
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