Dear Gromacs Users,<br><br>I am trying to calculate the surface tension at air/water interface of water model SPC/E. I used the command g_energy and chose #surfacetension. However, the output file was like this:<br>







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  <td style="height:15.0pt;width:65pt" align="right" height="15" width="65">0</td>
  <td style="width:65pt" align="right" width="65"> 14001.49219</td>
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 <tr style="height:15.0pt" height="15">
  <td style="height:15.0pt" align="right" height="15">0.5</td>
  <td align="right">21139.67773</td>
 </tr>
 <tr style="height:15.0pt" height="15">
  <td style="height:15.0pt" align="right" height="15">1</td>
  <td align="right">7328.798828</td>
 </tr>
 <tr style="height:15.0pt" height="15">
  <td style="height:15.0pt" align="right" height="15">1.5</td>
  <td align="right">16114.55664</td>
 </tr>
 <tr style="height:15.0pt" height="15">
  <td style="height:15.0pt" align="right" height="15">2</td>
  <td align="right">8224.392578</td>
 </tr>
 <tr style="height:15.0pt" height="15">
  <td style="height:15.0pt" align="right" height="15">2.5</td>
  <td align="right">16558.38867</td>
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 <tr style="height:15.0pt" height="15">
  <td style="height:15.0pt" align="right" height="15">3</td>
  <td align="right">8603.480469</td>
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 <tr style="height:15.0pt" height="15">
  <td style="height:15.0pt" align="right" height="15">3.5</td>
  <td align="right">-8019.197754</td>
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  <td style="height:15.0pt" align="right" height="15">4</td>
  <td align="right">-8756.329102</td>
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 <tr style="height:15.0pt" height="15">
  <td style="height:15.0pt" align="right" height="15">4.5</td>
  <td align="right">4309.573242</td>
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  <td style="height:15.0pt" align="right" height="15">5</td>
  <td align="right">5473.54541</td>
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  <td style="height:15.0pt" align="right" height="15">5.5</td>
  <td align="right">-4476.996094</td>
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  <td style="height:15.0pt" align="right" height="15">6</td>
  <td align="right">-2218.013672</td>
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  <td style="height:15.0pt" align="right" height="15">6.5</td>
  <td align="right">-8038.819336</td>
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  <td style="height:15.0pt" align="right" height="15">7</td>
  <td align="right">8374.514648</td>
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  <td style="height:15.0pt" align="right" height="15">7.5</td>
  <td align="right">10971.41602</td>
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  <td style="height:15.0pt" align="right" height="15">8</td>
  <td align="right">9115.582031</td>
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........<br><br>Please let me know how to deal with this result to get the surface tension value as reported in some articles?<br>Thank you in advance.<br>Regards,<br><br>Cuong<br clear="all"><br><br><div> </div><br>