Electrostatic Precipitator

Yes. Carry out field trials on suitable equipment.

I do not understand your answer. He asked for a way to calculate and you write "yes" and at same time recommend trials but do not give any indications about how to compute the displacement in the electrostatic field.

There is somewhere a contradiction since the calculation is based on a theoretical model and the trial is done to validate the model or determine the coefficients which are specific to the application and cannot be determined by only theoretical assumptions.

You can download lessons on how to design an ESP at the following website:

http://yosemite.epa.gov/oaqps/eogtrain.nsf/DisplayView/SI_412B_0-5?OpenDocument

The questing was related to migration velocity and the purpose of asking the question is due to the fact that two independent ESP manufacturers have come up with two different migration velocity which are far apart for the same electrode spacing, voltage and infact the dust loading at inlet and out let.

What i want to know is, the ways of calculating the Migration velocity.

As you can find in the docs recommended above the velocity is function of parameters which could have been differently chosen by the 2 companies. The one is the gas viscosity which function of temperature (for gases the higher the temperature the higher the viscosity) and the form coefficient of the particles in relative movement to the surrounding gas. If a mist droplet has to be considered at so low relative speeds as spherical it is not the case with other materials.

But it can be somewhere also a computation error.