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[ESPResSo-users] different outcomes for CPU and GPU
From: |
Renáta Tóthová |
Subject: |
[ESPResSo-users] different outcomes for CPU and GPU |
Date: |
Mon, 22 Jun 2015 10:02:37 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 |
Hello, Espresso developers,
I am a member of the Cell-in-fluid research group in Slovakia and I have
encountered this problem:
I have run the simulation in periodic channel with fluid only. There
were only bottom and top wall and fluid flowed due to external force in
x direction in the channel.
In first case, the fluid was computed using CPU - command lbfluid cpu.
In second case, the fluid was computed using GPU - command lbfluid gpu.
In both cases, there is Poiseuille/parabolic flow in the channel, but
the values of velocity differ in the two outputs. The values are from a
stable flow, after several thousand integration steps. The GPU
calculations run on Nvidia Tesla machine. I have used current espresso
master branch from github.
In the attachment, I am sending you the tcl script I have used.
Do you know what could be the issue?
Please, let me know. Thank you.
Have a nice day,
Renata Tothova
testCpuGpuFluid.tcl
Description: Text Data
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