Can you describe what this term means?

On Monday, May 22, 2023 at 3:12:47 AM UTC-5, Martin Brown wrote:

> >> I'm not sure of the definition of threshold frequency. 
> >> The lit is kinda all over, some say 11Hz is optimum, others say HF (1000Hz?) Some say AC is better than DC pulse, and Vise Versa. 
> >> I see no mention of the Actual Threshold frequency, it could very well be that threshold frequency is dependent on the 
> >> ratio of oil/water. water/oil emulsion and also the type of oil. 
> >> Mikek

> It will be sensitive to both the proportion of oil and water and the 
> size of the oil particles. You could try measuring how much power you 
> are delivering into the system as a way of optimising it. 

  We were measuring power, up until the last iteration of 8 output voltages to be used with 4 test at 4 different voltages.
Ideally we would measure each vessel, that is a bit unwieldy. 
    Yes, we have found different oils have different capacitance, and I have told my son to measure and record
 every type of emulsion that he tests, as this may be a way to correlate, what  power, frequency, AC, DC pulse, or even duty cycle is optimum.
 
> 
> (that could also be misleading but it would be a start
> > 
> > Threshold frequency is almost certainly dependant on what is being 
> > measured with respect to frequency. withcout concrete context it is 
> > meaningless.
> f_th (in Tex notation) it's meaning from the context is threshold 
> frequency. I don't know what it is in this system but it is likely to be 
> related to the separation of the particles in the emulsion, their size 
> distribution and the amount of electric field applied. 
> 
> To get them to coalesce you need to bang them together and as you do so 
> there are then fewer bigger particles further apart. My instinct is that 
> f_th will fall as the suspension begins to separate. 
> 
> Almost all colloidal systems have some critical behaviour when the 
> suspension reaches a critical density and so a suspension of small 
> conducting balls will snap from being an insulator to being a conductor 
> as the concentration of particles is slowly increased. 

  We have seen some increase in current flow as coalescence happens and contaminated water
falls to the bottom. I don't know how significant that was, and hopefully he will get back to measuring that.
                                      Thanks,  Mikek
> 
> -- 
> Martin Brown