Message: 1
Date: Tue, 8 Apr 2014 11:21:12 +0000
From: "Wink, Markus" <address@hidden>
To: "address@hidden" <address@hidden>
Subject: [ESPResSo-users] OIF - background_errors 0
Message-ID:
<address@hidden>
Content-Type: text/plain; charset="us-ascii"
Dear ESPResSo-community,
I have got a question concerning the OIF implementation. In my case
I have put an object (a sphere) in a microfluidic channel that has a
rhomboid as a barrier inside. I applied a constant force density to
achieve a fluid flow. I want to investigate the trajectory of the
object inside the channel. As it reaches the rhomboid, the object is
deflected by it. Nevertheless, I get an error message after some
time the object is in contact with the rhomboid:
background_errors 0 {063 rhomboid constraint 4 violated by particle 376}
My interpretation is, that one node of my object (particle 376)
tries to enters the rhomboid. That of cause should not be the case.
The rhomboid was defined by the command:
constraint rhomboid corner $corX $corY $corZ a $aX $aY $aZ b $bX $bY
$bZ c $cX $cY $cZ direction 1 type 10
lbboundary rhomboid corner $corX $corY $corZ a $aX $aY $aZ b $bX $bY
$bZ c $cX $cY $cZ direction 1
The object is defined by:
oif_add_object object-id 0 template-id 0 origin 125 85 9 part-type 0 mass 1
The object-rhomboid interaction is implemented by:
inter 0 10 soft-sphere 0.0001 1.2 0.1 0.0
How can I avoid the error message mentioned above? Is there any
mistake in my script? Does it help to lower the time step (so far, I
chose time_step 0.1)?
Thanks for your help?
Greetings
Markus Wink