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how to extract properties in a patch at a certain time domain?

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Old   January 6, 2013, 03:44
Default how to extract properties in a patch at a certain time domain?
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hi all
I need to obtain an average of pressure,velocity and temperature at a patch at last for example 100 time steps.how can i do this?i should add a sampledict at first before starting to run(if yes what codes should add to controldict?) or can it be done after running?if latter what are the codes?
Thanks for advices.
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Old   January 7, 2013, 00:19
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you can use patchAverage utility with keys -latestTime (for latest time slice) or key -time .... (to set time range)
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Old   January 7, 2013, 03:34
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thanks.could you give an example?is it correct? patchAverage rightside -time .003 .004
Then where the property is assign?
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Old   January 7, 2013, 06:46
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--- "patchAverage -time '0.01,0.02' alpha1 heated" to see patch average 'heated' of field 'alpha1' for times 0.01 and 0.02


--- "patchAverage -time '0.01:0.02' alpha1 heated" to see patch average 'heated' of field 'alpha1' for times in range from 0.01 to 0.02 (including boundaries)
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Old   January 7, 2013, 07:25
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thanks alot!
So if we want average of for example pressure on all the cells of a patch only in one time step it's trueatchAverage -time '.01' p rightpatch
Isn't it?
What you mean about all boundaries in the case of time range?
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Old   January 7, 2013, 11:42
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i mean: from from time t1 to time t2, including time points t1 and t2
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Old   January 7, 2013, 12:21
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grasped!thanks.is that correct what I said about one time step?does it give average of field over all the cells on the specified patch?
thanks again.
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Old   January 7, 2013, 16:23
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no, it will return average of external faces values (not the same as cell values). but this is true for zeroGradient patches (because values at cell centres and face centres, belonging to patch are same)
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Old   January 7, 2013, 17:16
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thank you very much dear matvej.
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