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sailfish-team / sailfish

Lattice Boltzmann (LBM) simulation package for GPUs (CUDA, OpenCL)
http://sailfish.us.edu.pl
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How to monitor the velocity along the center line of a cavity? #55

Open ztdepztdep opened 3 years ago

ztdepztdep commented 3 years ago

How to monitor the velocity along the center line of a cavity?

marcinofulus commented 3 years ago

Hi,

you can access fields after_step callback which can be implemented in youtrLBSim class.

e.g:

def after_step(self, runner): every_n = 10000

    if self.iteration % every_n == every_n - 1:
        self.need_sync_flag = True

    if self.iteration%every_n==0:
        vx,vy = runner._sim.vx, runner._sim.vy

Remember that sailfish does not copy gpu fields every step to host, so it has to know one step ahead to do so. Also if every is smaller than 100-1000 - the speed will be also smaller.

the best

mk

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How to monitor the velocity along the center line of a cavity?

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