[karthik_1414]

Hello Everyone,
Any ideas or suggestions on how to model electroplating on ansys? I would prefer the suggestions in command lines rather than the GUI. However, any suggestion is appreciated!!
Thanks, Regards,
karthik_1414

[cfdonlineuser]

I assume you're talking about electrorefing (single phase), as opposed to electrowinning (multiphase process)? If so, the implementation depends if you want to include electro-potential effects, or assume there is constant current density. In the latter case, this is relatively easy. You'll need a box geometry with good resolution near walls to resolve boundary layer (mass transfer of metal in solution), and turbulence SST model works well for this, as depending on the plating rate and size of plates , turbulence will develop. You'll need a single phase water, with an additional variable (the metal species concentration), with the additional variable linked to the buoyancy force. Volumetric expansivity coefficients for various metals like copper are well known. Then apply a positive source on one vertical plate (that being related to Faraday's law), and the same source but opposite sign on the other opposing plate. Start as a steady state run then restart in transient to capture unsteady eddies are known to develop along the plates. There is a large amount of experimental data to use for example Eriksson et al from The Royal Institute of Technology Sweden, right back from 1980s. You'll find the constant density approach takes you a long way in comparisons with experimental data.

[karthik_1414]

hey,
Thanks! will try this!
Regards,
Karthik_1414

[imnull]

Originally Posted by cfdonlineuser

I assume you're talking about electrorefing (single phase), as opposed to electrowinning (multiphase process)? If so, the implementation depends if you want to include electro-potential effects, or assume there is constant current density. In the latter case, this is relatively easy. You'll need a box geometry with good resolution near walls to resolve boundary layer (mass transfer of metal in solution), and turbulence SST model works well for this, as depending on the plating rate and size of plates , turbulence will develop. You'll need a single phase water, with an additional variable (the metal species concentration), with the additional variable linked to the buoyancy force. Volumetric expansivity coefficients for various metals like copper are well known. Then apply a positive source on one vertical plate (that being related to Faraday's law), and the same source but opposite sign on the other opposing plate. Start as a steady state run then restart in transient to capture unsteady eddies are known to develop along the plates. There is a large amount of experimental data to use for example Eriksson et al from The Royal Institute of Technology Sweden, right back from 1980s. You'll find the constant density approach takes you a long way in comparisons with experimental data.

is there any tutorials on it?
how easy to model electrowinning (multiphase process)?
thanks.

[Sayantan Biswas]

Originally Posted by cfdonlineuser

I assume you're talking about electrorefing (single phase), as opposed to electrowinning (multiphase process)? If so, the implementation depends if you want to include electro-potential effects, or assume there is constant current density. In the latter case, this is relatively easy. You'll need a box geometry with good resolution near walls to resolve boundary layer (mass transfer of metal in solution), and turbulence SST model works well for this, as depending on the plating rate and size of plates , turbulence will develop. You'll need a single phase water, with an additional variable (the metal species concentration), with the additional variable linked to the buoyancy force. Volumetric expansivity coefficients for various metals like copper are well known. Then apply a positive source on one vertical plate (that being related to Faraday's law), and the same source but opposite sign on the other opposing plate. Start as a steady state run then restart in transient to capture unsteady eddies are known to develop along the plates. There is a large amount of experimental data to use for example Eriksson et al from The Royal Institute of Technology Sweden, right back from 1980s. You'll find the constant density approach takes you a long way in comparisons with experimental data.

Dear Sir,
I'm working on Copper Electrorefining process (single Phase) in Fluent. so I'm supposed use

i) Turbulence model (k-e)
ii) Species Transport model (electrochemistry option is there)
iii) Energy model
iv) Potential Model.

I'm I correct?

I'm facing problem in Adding material part;

1) How do I add an electrolyte (liquid state) consist of Water+CuSO4+H2SO4 solution (having certain Cu concentration) ?

2) How do I add Cu+2 ions (any metal ion) in the reaction mixture so that I can define the electro chemistry (cathodic/anodic) reaction in Species Transport model?

3) In fluent user guide example of water electrolysis is given i.e. electrolyte itself is participating/converting but in my case I want cathode anode to participate i.e electro deposition/platting not the electrolyte. How do I put this condition to fluent?

Please please help.
Thanks in Advance

[Sayantan Biswas]

Originally Posted by cfdonlineuser

I assume you're talking about electrorefing (single phase), as opposed to electrowinning (multiphase process)? If so, the implementation depends if you want to include electro-potential effects, or assume there is constant current density. In the latter case, this is relatively easy. You'll need a box geometry with good resolution near walls to resolve boundary layer (mass transfer of metal in solution), and turbulence SST model works well for this, as depending on the plating rate and size of plates , turbulence will develop. You'll need a single phase water, with an additional variable (the metal species concentration), with the additional variable linked to the buoyancy force. Volumetric expansivity coefficients for various metals like copper are well known. Then apply a positive source on one vertical plate (that being related to Faraday's law), and the same source but opposite sign on the other opposing plate. Start as a steady state run then restart in transient to capture unsteady eddies are known to develop along the plates. There is a large amount of experimental data to use for example Eriksson et al from The Royal Institute of Technology Sweden, right back from 1980s. You'll find the constant density approach takes you a long way in comparisons with experimental data.

Dear Sir,

Regarding geometry I'm having an fundamental doubt.
I've created two different geometry. (using space claim)

Case I;
i) create an rectangle..extrude it (pull) you get the electrolyte bath.

ii)again create different rectangles (two) having smaller dimension..extrude it you will get the electrodes.

iii)Insert those two electrodes inside the cell bath.

thus you will get 3 solid bodies: Bath Cathode and Anode; therefore meshing will be there inside the Electrodes.

Case II;

i) create and rectangle
ii) again create two rectangles having smaller dimention.
iii) move/shift those two small rectangle and placed on/upon the bigger rectangle.
iv) extrude 3 surfaces individually.

here you will get Bath Cathode Anode but in a Single Solid Body not as 3 different solid bodies; Cathode Anode you will get like a void region/space i.e. Meshing wont be there inside the electrodes.

which on the correct one?

Please Help.