# Can not add a new user defined visualization parameter in Cut plot!

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 November 3, 2011, 14:10 Can not add a new user defined visualization parameter in Cut plot! #1 Member   Join Date: Oct 2010 Posts: 63 Rep Power: 7 I am trying to add a new user defined visualization parameter, that will alway substract the normal atmosferic pressure at sea level (101325 Pa) from the pressure I got in my analysis. I suceeded in creating this new visualization parameter, but for some reason, I can not add it to my parameters list in the Cut plot parameters list. Take a look what I did: http://www.youtube.com/watch?v=Q5mWr...ature=youtu.be Why I can not add the new parameter "substracted pressure" to my list? But I can add the default ones? Thank you for the reply.

 November 6, 2011, 07:25 #2 Member   Join Date: Oct 2010 Posts: 63 Rep Power: 7 It seems I did not have to add "Pa" in the forumula. So instead: {Pressure}-101325 Pa I need: {Pressure}-101325 Now it is working. But, I want to divide this with 1000, so that I get kN/m2 instead of Pascals. How can I do that? This did not worked: ({Pressure}-101325)/1000 Any suggestions?

 November 6, 2011, 15:29 #3 Senior Member   Boris Marovic Join Date: Jul 2009 Posts: 464 Rep Power: 15 Hi George, no, you don't need to ad "Pa". FloEFD calculates with the values only. If you go to the "Item Properties" tab in your formula definition you can set the unit in the last row of your user parameter. Regards, Boris

 November 6, 2011, 18:39 #4 Member   Join Date: Oct 2010 Posts: 63 Rep Power: 7 Thank you for the reply Boris. Is this what you meant: But in that case I will only get the units in Pascals right? And I want my units to be in kN/m2, and 1kN/m2 equals 1000 Pascals. This is why I asked, how can I divide this formula: {Pressure}-101325 with 1000. I tried this, and it is not working: ({Pressure}-101325)/1000

 November 9, 2011, 14:33 #6 Member   Join Date: Oct 2010 Posts: 63 Rep Power: 7 You are right! It worked for me too. All I had to do is restart my Solid works, and them the ne adition (...)/1000 works. Otherwise it shows me the same results as it was without the (...)/1000 Thank you for such a nice explanation. I am trying to get a pressure impact of wind, on structures (like buildings) for example. But I see that even in that case, I need to change the mesh of the contour plot, the way you did. And there are no training at the local dealer. Believe it or not Still if there are in my country, they are to far from me. I am an architect, this is why you might find lame and strange, some of my questions. But I am doing my best to learn from a lot of fields. Statics (structural design and analysis of structures), foundations calculation, light analysis... Now I want to find out, how to get a wind load. Thank you for the replies once again.

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