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Summary

The vector plot of the air velocity shows that the air moves upward all the way to the water surface, where it escapes. The baffle walls located on the sides of the tank prevent the undesirable vortex formation.

5.Calculate the torque about the shaft for the Rushton blade turbine.

Results → Reports → Forces...

a.From the Options group box, select Moments.

b.In the Moment Center group box, enter 0, 0, and 0 for X, Y, Z, respectively.

c.In the Moment Axis group box, enter 0, 0, and -1 for X, Y, Z, respectively.

d.From the Wall Zones selection list, deselect all zones by clicking and then select wall_impeller_1.

e.Click Print.

Fluent reports the individual and net values of the pressure moment, viscous moment, total moment, pressure coefficient, viscous coefficient, and total coefficient about the specified center in the console.

The power requirement is simply the required torque (0.03767 N m) multiplied by the rotational speed (450 rpm = 47.12 rad/s): 0.03767 N m * 47.1 rad/s = 1.77 W.

Note that this value does not account for any mechanical losses, motor efficiencies, and so on.

19.5. Summary

This tutorial demonstrated how to set up and solve a turbulent multiphase flow in the mixing tank using the Eulerian multiphase model. You learned how to set degassing boundary conditions and boundary conditions for primary and secondary phases. After completing the simulation, you displayed the results of your calculation and calculated the torque and power requirements. For more information about the Eulerian multiphase model, see the Fluent User's Guide.

Release 2019 R1 - © ANSYS,Inc.All rights reserved.- Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.	671

vk.com/club152685050 | vk.com/id446425943

	Release 2019 R1 - © ANSYS,Inc.All rights reserved.- Contains proprietary and confidential information
672	of ANSYS, Inc. and its subsidiaries and affiliates.