Hi All,

I have modelled a mixing tank in CFX4.4, using tansient flow approach. My results look good. Now I want to

give a presentation in a conference to a mixed audience, that might find the rigour of CFD boring.

Could some one tell me how I can show the audiense (I will have CFD on line) the animation of the movement of the impeller blades in the Post process. I do not want to use power point to do this bit.

Thanks Eldoret

Hi Eldoret,

Your problem seems to look like that of a sales person, promoting CFX. Really the CFX people reading this should help you out. I have seen some one do it, and it was all that caught the attension of many. " So CFX can do such a fascinating work". I heard some one say this. I must confess that I have never thought of doing it but it is worth knowing, even if it is just to impress your, non scientist boy/girl friend (a joke!).

regards nyatoto

Eldoret:

I've generated a MPEG animation with CFX analyze and CFX post to show agitator movement. The MPEG animation file can then be played off line with a media player or with power point. To create the MPEG file, an intermediate dump file (print options) was saved every 2 to 3 degrees rotation of the agitator. The post processor can then create the MPEG file.

Regards, John

Hi John and Nyatoto,

Thank you both for activating my post which was almost forgotten. John, please allow me to ask you something further, after saving the the intermediate dump files, how do you tell CFX ANALYSE to create the MPEG file? After this is created, do I just go to post process animation, select the file then play? I would very much appreciate if you gave me a step by step procedure. I do not want to use POWER POINT, instead I want to emphasise the CFX POWER.

In fact, Nyatoto was very right. I want to impress some administrators (i hope they are not reading this!!) in this conference, who have put their money into CFX.

regards Eldoret

The on-line help for Analyze/Post provide a tutorial on animations.

The on-line help for Analyze/Post provide a tutorial on animations.

Hi John, You said that "The on-line help for Analyze/Post provide a tutorial on animations. " Yes, I agree. There is an easy tutorial in CFX5.5.1. I have done that but unable to do the same in CFX4.4.

You said that I need to create intermediate dmp files, I did that.What i have seen is that the intermediate dmp files (hope they are the IDF#.DMP) are deleted at the end of the run and immediately CFX.DMP is formed. After the closure/deletion of the .cfx_tmpdir, an m#.dmp file is created.

Here is the problem, (1) when I run Analyse, I must load a dmp, if I load m#.dmp then it means that my IDF#.DMP files will have been deleted already.

(2)I missing the link between the intermediate dmps and the MPEG. Please help. (3) If I set intermediate dmp files to be created after say 2 time steps I do not see all of them created!! What am I doing wrong??

Thanks for your keen interest in this.

Regards Eldoret

Hi Eldoret:

Try the tutorial "Volume Fraction of Liquid Phase Animation" in the Analyze Online Help.

For a stirred tank animation with CFX4.4, I use the DUMP FILE OPTIONS and set a TIME STEP INTERVAL, FINAL SOLUTION, ALL VARIABLES, and GEOMETRY DATA. This creates a single dumpfile that contains all the info for each time step interval. When the dump file is converted by Analyze, it generates the necessary transient files (trn.###) for creating the MPEG file.

Regards, John

Hi John, Thanks for your kind assistance. I will try it as you have suggested.

Regards, Eldoret