UTF-8
Pressure conveyance through fluids I
255255204
The models on this page seek to demonstrate that fluids are capable of conveying pressure. Adding obstacles into the fluid only increases the resistance to flow, i.e. it flows slower (Case 2). It does not cause pressure to diminish.
Case 1:
Case 2:
The simulations also show that fluids flow in the direction in which pressure decreases. In other words, pressure difference is the driving force for the flow of fluids. This is different from the case of diffusion, in which concentration difference is the cause of molecular movement. The major difference between the two mechanisms is that work is done to the molecular system when the system moves under exerted pressure, whereas diffusion is a spantaneous process that needs no input of energy.
8.0
1
org.concord.modeler.text.LineIcon4010105<html>
<head>
</head>
<body>
<table align="center" width="100%">
<tr>
<td align="center">
<font face="Trebuchet MS" size="5"><b>Pressure conveyance through
fluids</b></font>
</td>
</tr>
</table>
</body>
</html>
-e17507575
1
org.concord.modeler.text.LineIcon42101010<html>
<head>
</head>
<body face="Trebuchet MS">
<table width="100%">
<tr>
<td width="50">
<img src="previous-disabled.png" border="0">
</td>
<td width="50">
<a href="pressureconveyance2.cml"><img src="next.png" border="0">
</a>
</td>
<td>
<table width="98%">
<tr>
<td width="20%" bgcolor="#eeeeaa">
Page 1 of 4
</td>
<td width="50%" bgcolor="#Ffffdd">
</td>
<td align="right">
<font><a href="../../monograph.cml"><img src="arrow.gif" border="0">
</a></font>
</td>
<td>
Interactive Essays 
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>
-243f9a7575
8.0
75.0
75.0
8.0
75.0
true18Trebuchet MS
75.0
8.0
1
org.concord.mw2d.activity.AtomContainer
pressureconveyance1$0.mmlfalse
8.0
1
org.concord.modeler.PageSlider
org.concord.mw2d.models.MolecularModel
0
5.0
0.0
10.0
10
Adjust pressure on the two pistons
400
70
false
true
{value="10.0", label="Higher on right piston"}{value="5.0", label="Equal pressure"}{value="0.0", label="Higher on left piston"}
Execute MW script
8.0
1
75.0
75.0
true18Trebuchet MS
8.0
1
8.0
1
org.concord.mw2d.activity.AtomContainer
pressureconveyance1$1.mmlfalse
8.0
1
org.concord.modeler.PageSlider
org.concord.mw2d.models.MolecularModel
1
5.0
0.0
10.0
10
Adjust pressure on pistons
Adjust pressure on pistons
400
70
false
true
{value="10.0", label="Higher on right piston"}{value="5.0", label="Equal pressure"}{value="0.0", label="Higher on left piston"}
Execute MW script
8.0
1
75.0
75.0
8.0
8.0
1
org.concord.modeler.text.LineIcon45101010<html>
<head>
</head>
<body face="Trebuchet MS">
<table width="100%">
<tr>
<td width="50">
<img src="previous-disabled.png" border="0">
</td>
<td width="50">
<a href="pressureconveyance2.cml"><img src="next.png" border="0">
</a>
</td>
<td>
<table width="98%">
<tr>
<td width="20%" bgcolor="#eeeeaa">
Page 1 of 4
</td>
<td width="50%" bgcolor="#Ffffdd">
</td>
<td align="right">
<font><a href="../../monograph.cml"><img src="arrow.gif" border="0">
</a></font>
</td>
<td>
Interactive Essays 
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>
-243f9a7575