Role of Joule heating in dispersive mixing effects in electrophoretic cells: Convective-diffusive transport aspects

Batch electrophoretic cells with Eyring fluids: Analysis of the hydrodynamics

“…The velocity profile computed in this investigation is useful in making comparisons among the carrier fluids with different rheologies [1,2,9,10] value of the Joule heating number is high enough to produce a temperature value at the center of the cell which is higher than the temperature values at the walls. Figure 5 shows the remarkably different behavior that non-Newtonian carrier fluids may demonstrate under the influence of the Joule heating effect, compared to the behavior of Newtonian carriers.…”

“…The objectives of the present study are (i) to increase knowledge of the behavior of non-Newtonian carrier fluids used to control convective-diffusive problems inside a discontinuous electrophoretic cell; (ii) to improve understanding of the influence of Joule heating on the behavior of the temperature profile inside the electrophoretic cell; (iii) to determine the influence of Joule heating on the hydrodynamic velocity profile inside the electrophoretic cell for the case of Eyring-model non-Newtonian carriers [1]; (iv) to compare the results of the present study with those obtained using other rheologies analyzed in previous studies [1,2,6,9]. According to the above general objectives, the device selected to perform the analysis is shown in Fig.…”

“…This research attempts to determine the effect of Joule heating on the velocity profile inside the electrophoretic cell. To this end, a methodology originally proposed by Bosse and Arce [1,2] will be used. Their approach seeks a sequential coupling among the different modes of transport.…”

Zone Electrophoresis in an Inner-cooling Wide-bore Electrophoresis System with UV Detection

“…In electrophoresis, the Joule heat generates a radial temperature distribution in the liquid solution and the solid capillary wall, which exhibits a parabolic-like pattern with the centerline having the highest temperature. [15][16][17] This radial temperature distribution becomes more serious as the diameter of the separation tube increases, even under the same physicochemical conditions. 18 This unevenness can complicate the profile of the electrical conductivity, dynamic viscosity and diffusion coefficient across the electrophoresis channel.…”

Microfluidic free-flow electrophoresis for proteomics-on-a-chip

“…A similar device was also used for the separation of high molecular weight compounds where band broadening effects were studied [33]. Joule heating, a major problem in conventional-size FFE systems [76], plays no significant role in the chip based FFE since the high surface to volume ratio allows efficient heat dissipation. In conventional-size FFE systems the separation chamber is isolated from the electrode compartments by ion permeable membrane spacers [16].…”