# Mass flow Averaged quantities

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 June 29, 2005, 02:04 Mass flow Averaged quantities #1 Fred Guest   Posts: n/a Hello everybody, I am new to starcd. how to calculate the mass flow average quantities at the boundaries(say inlet/outlet).Can anyone please help me?I tried loading variable(pressure),density,volume and area in different registers but here area values are not loading along with the variable.Calculation of area average quantities also would solve my problem. thank you Regards Fred

 June 29, 2005, 04:01 Re: Mass flow Averaged quantities #2 som Guest   Posts: n/a select cells attached to inlet/outlet boundary and then make shell on that cell face where boundary lies. Then do Post>flux>pick shell ....as soon as the curser wil come on the prostar window , select the shell u already made on that cell face of inlet/outlet.

 June 30, 2005, 06:39 Re: Mass flow Averaged quantities #3 Fred Guest   Posts: n/a Dear som, Thank you for ur reply I am very new to star-cd so i am not finding how to calculate the massflow average value of a pressure at the boundaries.As u said how to put the calculated flux values (which is obtained by post-->flux sum-->pick shell) into the registers and manipulate with the pressure or any variable.Can u please explain me in detail? Regards Fred

 July 1, 2005, 05:11 Re: Mass flow Averaged quantities #4 som Guest   Posts: n/a these r the following steps: 1. go to the tool pop-up menu Tool> cell tool 2. select shell as active cell type 3. then add shell>surface(new edge...) (add shell only where er pressure boundary lies) 4. load *.pst file 5. from vector field load Mass flux avg. 6. go to the post pop-up menu post>flux summ> pick shell type 7. after this cross will come to the prostar window then select the shell u have already made on the pressure boundary. this will give u the mass flux avg valu in kg/sec. byeeeee

 July 1, 2005, 11:09 Re: Mass flow Averaged quantities #5 Hubert Janocha Guest   Posts: n/a In NavCenter "Analyses Controls -> Output Controls -> Monitor Numeric Behvior" switch on "Print Iteration Residuals and Convergence Check". You will get your desired information in the *.info file for each iteration. In star you have the possibility the write out boundary infos in a seperate *.erd file, or cell-set data in a *.ecd file. with the command "pscreate" you can generate planes of shells, wich cut the mesh in a free/arbitrary location where and how ever you want. with "pmap" you can map the values of the 3D-fluid-cells (which are cutten by the shells) to the shells. BE AWARE: 1. when you map massflow the mapped value is really the massflow through the whole cell, respectivly the face. That means the value is of course greater for larger cells. A plot of this is not sensible/reasonable, because of the mesh dependency. What you want to know in a massflow plot is the massflow according to the area. 2. The coordinate system in the NavCenter "Post-Processing -> Load Data -> Data" is important for all vector velues, and the massflow is a vector.

 July 5, 2005, 02:05 Re: Mass flow Averaged quantities #6 som Guest   Posts: n/a If u want to calculate the area only then select the bopundary u want to calculate. then from Utility> Calculate area> boundary set u can get the area of that boundary.

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post otrebla CFX 0 April 11, 2008 10:03 david FLUENT 1 August 22, 2005 19:46 Cb CD-adapco 0 January 18, 2005 05:59 Joern Beilke CD-adapco 3 November 28, 2003 22:05 Jaipal CD-adapco 7 January 2, 2003 02:17

All times are GMT -4. The time now is 07:37.

 Contact Us - CFD Online - Top