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-   -   power calculation for mixing tanks (http://www.cfd-online.com/Forums/fluent/111693-power-calculation-mixing-tanks.html)

mr_atila January 13, 2013 07:09

power calculation for mixing tanks
 
I need to define the power input and power number for mixing tank filled with water. But I dont know how to do postprocess to define it. Please let me know which features of Fluent should be used for the prediction of power number and power consumption.
Looking forward to hearing from u guys :)

Regards

behruz April 27, 2013 15:01

Hi mr atila
At the first u have to calculate torque.In fluent: report- force- moments
and power equale 2ΠN(rad/sec) M(N.M)
P0(power number)= P(w)/(density*N^3*D^5)

mr_atila May 1, 2013 22:21

1 Attachment(s)
HI Buddy
Thanks for ur reply
I got the attached report, Could you please let me know which one should be used?

Thanks

ghost82 May 2, 2013 03:02

Quote:

Originally Posted by mr_atila (Post 424531)
HI Buddy
Thanks for ur reply
I got the attached report, Could you please let me know which one should be used?

Thanks

Total moments only for impeller walls; take care if you have periodic domain; for example if you have 90 degree periodic model you have to multiply the power by a factor of 4, to obtain the full impeller power.

Daniele

mr_atila May 2, 2013 06:37

Quote:

Originally Posted by ghost82 (Post 424564)
Total moments only for impeller walls; take care if you have periodic domain; for example if you have 90 degree periodic model you have to multiply the power by a factor of 4, to obtain the full impeller power.

Daniele

Tnx Daniel
I solved this with complete 3D domain. So, Just would you please let me know which numbers could be used for power measurement.

wishes

A CFD free user May 2, 2013 16:50

Hi
I got some slides or pdf I'm not sure yet, regarding the measurement of important parameters such as power number in stirred tanks. Contact me via mail:
aboozar.azarafza@gmail.com
I might be able to find them and sending you.

jeicek April 22, 2014 21:26

Dear A CFD free user
I would also be very appricated if you share them with me as well and please tell me how to cntact u


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