[yashganatra]

I am simulating solidification of a metal in an enclosure with Natural Convection. In operating conditions, I switched on gravity and put -9.8 in Y direction and operating temperature as melting temp (302.9 K).
Left wall is at 290 K and right wall at 310 K
I used QUICK scheme for discretization and SIMPLE algorithm. I have kept VOF OFF.
However, the contours of temperature and liquid fraction are vertical lines which shouldn't be the case as i am using Boussinesq Approximation.
I referred manual and it states that the enthalpy is updated using enthalpy porosity technique. I am attaching screenshots of all my conditions.

I would be grateful if someone could suggest the possible errors.
Kindly help

Thanks,
Yash

[Far]

http://www.afs.enea.it/fluent/Public.../PDF/chp21.pdf

[yashganatra]

Thank you for your reply. Sir, I have followed this tutorial. This involves continuous casting. and I am not clear why g has been specified in the X direction. However I am unable to get the contours of liquid fraction for my case

[yashganatra]

http://www.cfd-online.com/Forums/flu...technique.html

Could you please check my UDF also? I have searched lots and now I am stuck here. It would be great if anyone could help out.

Thanks,
Yash

[yashganatra]

I have included link in the above message

[sooroo3]

You should activate "specified operating density" in variable-density parameters. hope it help you.

[ravipvb]

HI, I believe that you will get the vertical lines only because for low temperature difference between hot and cold wall, conduction and convection exist together and phase front is parallel to the hot & cold walls. your are simulating a simple case so there shouldn't be any problem...go through this paper.."Nanoparticle-enhanced phase change materials (NEPCM) with great potential for improved thermal energy storage; J. M. Khodadadi, S. F. Hosseinizadeh"

[dinesh]

Originally Posted by sooroo3

You should activate "specified operating density" in variable-density parameters. hope it help you.

will the operating temperature be the melting temperature. Also what we be the operating density whether is will be of soild or melted liquid. also while using PISO/Body force weighted/2nd order scheme i get the divergence after some initial run. my flow dir is Y, but divergence comes in x and z components of velocity. what should i do.

[Tri_marsah]

Originally Posted by yashganatra

I have included link in the above message

could you give me your file .msh??
maybe i can help your problem. because few day ago, i simulated solar water heater problem, and i think your problem as same as with my simulated
my email : tri01091991@gmail.com

[Zaktatir]

check up the reference density!

[Zaktatir]

and i will start with a reference temperature equal to the middle temperature between the walls!

[adi83]

Hello everyone,

Does anyone knows how to simulate solidification in the DPM, because currently I study droplet solidification in gas atomization.

Thank you very much for the attention.
Dudi

[nishi]

helllo

I am new to fluent...plzz help me
I am solving a continuous casting model in fluent....my solid shell thickness is coming less that what is expected......
can anyone suggest me what can i do?
does specifying operating density has anything to do with it?
does the selection of steady/transient model affect it?

[mojtaba.safdari.ms@gmail.]

i have the similar problem when should i enable VOF is it necessary for simulating melting/solidification???