# power calculation for mixing tanks

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 January 13, 2013, 07:09 power calculation for mixing tanks #1 New Member   Join Date: Jan 2013 Posts: 3 Rep Power: 5 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

 April 27, 2013, 15:01 #2 New Member   behrooz Join Date: Mar 2013 Posts: 24 Rep Power: 5 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) jamalf64, mr_atila and leroy ping like this.

May 1, 2013, 22:21
#3
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HI Buddy
Thanks for ur reply
I got the attached report, Could you please let me know which one should be used?

Thanks
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May 2, 2013, 03:02
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Daniele
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Quote:
 Originally Posted by mr_atila 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

May 2, 2013, 06:37
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Quote:
 Originally Posted by ghost82 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

 May 2, 2013, 16:50 #6 Senior Member     A-A Azarafza Join Date: Jan 2013 Posts: 205 Rep Power: 6 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 likes this. __________________ Regard yours

 April 22, 2014, 21:26 #7 New Member   jeicek Join Date: Nov 2013 Location: Germany Posts: 18 Rep Power: 4 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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