Yade

how long does a simulation take?

Asked by azim

Dear all,
i built my model with 1000 particles and i want to increase the particles to 20000(for example), i want to make a guess of time needed for simulation!
is it possible to estimate the time that a simulation will take to be completed? and, on what simulation parameters does it depend?

i want to work with this system:
 core(TM)i7-4500U 1.8 GHs to 2.4 GHs
RAM 8G

thanks in advance.
Azim

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Robert Caulk (rcaulk) said : 		#1

Hello Azim,

The duration of a simulation depends entirely on the simulation you plan to run. Triaxial? Uniaxial? Something else? Is it concluded by reaching a certain simulation time? Strain value? Something else?

If you know the number of required iterations, you could simply start the simulation with however many particles you wish, then take your required desiredIteration (iter) and divide it by O.speed (iter/second):

desiredIteration/O.speed = real-world time to get to desiredIteration (seconds)

If you have a desiredModelTime you could use O.realtime (seconds) and O.time (modelSeconds):

(O.realtime/O.time) * desiredModelTime = real-world time to get to desiredModelTime

If you have a desiredStrain (strain), and you are imposing a constant strainRate (strain/modelSecond) you could use:

(desiredStrain / strainRate) * (O.realtime / O.time) = real-world time to get to desiredStrain

I hope you see the pattern! I cannot cover all possible simulation conclusion types.

Cheers,

Robert

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Robert Caulk (rcaulk) said : 		#2

Did this answer your question, Azim? Please mark questions solved if they are.

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azim (mirzavand) said : 		#3

Hi Rubert,
>Did this answer your question, Azim? Please mark questions solved if they are.
 not really
i have problem with real-world time and desiredModelTime meaning.
i will list my question with complete details as soon as possible, and ask for your help.
Azim

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azim (mirzavand) said : 		#4

Really sorry,(Robert)

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Launchpad Janitor (janitor) said : 		#5

This question was expired because it remained in the 'Open' state without activity for the last 15 days.