I tried to have the water density changing with both temperature and pressure, and so took the user database values. However, it says "insufficient dimmension for the molecular viscosity array". I solved the problem NCMAXV into NCMAX and all the others datas to be able to run the analysis. However, after I did it, the ouput given in a transient mode is absolutely wrong!! The density of water remains constant and equal to 1.2kg/m3 !!! What can I do? Is the user database wrong? It however looks right when we edit it!! Thank you in advance in you have a hint. Yann

Just a guess: Have you changed the cell material after defining a new material? Do you use liquid water or water vapour? How do you calculate the density?

Dear Mork, that is effectively the first question to as, but yes, the cells are defined as liquid, and I am using liquid water. I am using the option: select material from database, then water(l), and then I tried to use "use internal properties calculation" which tells that the dimension array for viscosity is insufficient. What can I do? Create my own database? I also tried to use isobaric properties, defining the datum pressure as 997kg/m3, but the density doens't vary neither. Regards, Yann

When you have changed your set up, do you re-write the .geom file (to get a new parm.inc) and re-write the .prob file?

Thanks Richard,but yes I did rewrote both of them. Redards, Yann

Are you using VOF? In that case you can only have constant densities for both fluids.

Dear all, I resigned from my first idea to have the internal value for the water density. These value seem to be wrong...? I simply used the isobaric density for the water which is however less far convinient for the model I have to make. Anyway, thank you all for you help, and if ever someone knows the clue... Yann