<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";
mso-fareast-language:EN-US;}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";}
span.EmailStyle19
{mso-style-type:personal;
font-family:"Arial","sans-serif";
color:#3C3C3C;}
span.EmailStyle20
{mso-style-type:personal-reply;
font-family:"Arial","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-GB" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#3C3C3C">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#3C3C3C"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#3C3C3C">I’m trying to visualise lagrangian particle pathlines. I have run an openFoam simulation with particle tracking and would like to view the paths that the particles
take. I have read lots of discussion of this on the internet, but without much success. I can load the data in Paraview and assign glyphs, but I can’t visualise the pathlines taken by the particles.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#3C3C3C"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#3C3C3C">I am cautious that Paraview might have some functionality for interpolating particle tracking from the eulerian data. I might end-up visualising this approximation,
rather than the lagrangian data calculated on a timestep-by-timestep basis by openFoam. (Although an ability to do either or both would be useful!)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#3C3C3C"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#3C3C3C">So far, my best luck seems to have come from masking my data and then using the particlepath filter, using the un-masked data as my input and the masked data
as a seed. This is OK, but requires me to incrementally increase the finished time to observe the particle paths.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#3C3C3C"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#3C3C3C">Can you offer any help?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#3C3C3C"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#3C3C3C"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#3C3C3C;mso-fareast-language:EN-GB">Dr David Robinson</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#3C3C3C;mso-fareast-language:EN-GB"><br>
Engineer, Coastal Structures<br>
<br>
E: <a href="mailto:d.robinson@hrwallingford.com"><span style="color:black">d.robinson@hrwallingford.com</span></a><br>
T: +44 (0)1491 822397<o:p></o:p></span></p>
<p class="MsoNormal"><a href="http://www.hrwallingford.com/banner.html"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-GB;text-decoration:none"><img border="0" width="1" height="1" id="_x0000_i1025" src="http://www.hrwallingford.com/site/images/HRW_Banner.gif" alt="HR Wallingford Banner"></span></a><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#3C3C3C;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<div class="MsoNormal" align="center" style="text-align:center"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#3C3C3C;mso-fareast-language:EN-GB">
<hr size="1" width="100%" align="center">
</span></div>
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td width="205" style="width:153.75pt;padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#3C3C3C;mso-fareast-language:EN-GB"><img border="0" width="197" height="66" id="_x0000_i1027" src="http://www.hrwallingford.com/site/images/HRW_Logo.gif" alt="HR Wallingford Logo"><o:p></o:p></span></p>
</td>
<td style="padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:gray;mso-fareast-language:EN-GB">HR Wallingford</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:gray;mso-fareast-language:EN-GB"><br>
Howbery Park, Wallingford, Oxfordshire OX10 8BA, United Kingdom<br>
T: +44 (0)1491 835381 F: +44 (0)1491 832233<br>
<a href="www.hrwallingford.com"><span style="color:gray">www.hrwallingford.com</span></a>
<o:p></o:p></span></p>
</td>
<td style="padding:3.75pt 3.75pt 3.75pt 3.75pt">
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#3C3C3C;mso-fareast-language:EN-GB"><img border="0" width="170" height="64" id="_x0000_i1028" src="http://www.hrwallingford.com/site/images/HRW_Logo2.gif" alt="HR Wallingford Secondary Logo"><o:p></o:p></span></p>
</td>
</tr>
</tbody>
</table>
<div class="MsoNormal" align="center" style="text-align:center"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#3C3C3C;mso-fareast-language:EN-GB">
<hr size="1" width="100%" align="center">
</span></div>
</div>
<br>
<hr>
<p style="font-family:arial;font-color:grey;font-size:8pt"><b>HR Wallingford and its subsidiaries</b> uses faxes and emails for confidential and legally privileged business communications. They do not of themselves create legal commitments. Disclosure to parties
other than addressees requires our specific consent. We are not liable for unauthorised disclosures nor reliance upon them.
<br>
If you have received this message in error please advise us immediately and destroy all copies of it.
<br>
<br>
HR Wallingford Limited<br>
Howbery Park, Wallingford, Oxfordshire, OX10 8BA, United Kingdom<br>
Registered in England No. 02562099<br>
</p>
<p></p>
<hr>
<p></p>
</body>
</html>