As a significant index to evaluate the mixing efficiency

studying the concentration distribution is directly related to the intensity of segregation (

I

s

). In this work

the

I

s

of the mixture composed of NaCl solution-water was investigated experimentally in a rotating bar reactor (RBR) by the conductivity method. The results showed that the mixing efficiency was improved along the axial direction from the bottom to the top in the RBR. The concentration distribution at the bottom section was more uneven

and

I

s

was higher compared with the top section

which decreased from 6.53×10

-5

to 1.57×10

-7

. With the increase of rotational speed from 0 to 700 r·min

-1

I

s

at the bottom and top sections decreased from 4.27×10

-3

to 7.10×10

-5

and from 1.93×10

-3

to 7.29×10

-7

respectively. The increases flow rate of solution A

and the decreases of concentration of NaCl and flow rate of solution B gave rise to the reduction of

I

s

signifying an improved mixing efficiency. The results revealed that the conductivity method used in this pa

per has high efficiency and low cost to measure the

which indicates a promising prospect for estimating reactors’ mixing performance.