Comparing the Influence of the Drop Fill and Overflow Rinsing on the Reactive Dyeing Process in a Textile Dye House

Drop/fill rinsing method was used for reducing the high water consumption of overflow rinsing process in textile dye house. However, it is not known whether this drop/fill method has adverse effects on the final fabric properties or not. In this study, the effects of using drop/fill method instead of overflow rinsing process on colorimetric and fastness properties of 100% cotton towel fabrics are investigated. It is found that, skipping to the drop fill rinsing method from the over flow rinsing process and obtained fresh water saving has no negative effect on colorimetric and color fastness values of the processed fabric samples and can be used conveniently in the industrial sized production. © Published under licence by IOP Publishing Ltd

Comparing the Influence of the Drop Fill and Overflow Rinsing on the Reactive Dyeing Process in a Textile Dye House

Drop/fill rinsing method was used for reducing the high water consumption of overflow rinsing process in textile dye house. However, it is not known whether this drop/fill method has adverse effects on the final fabric properties or not. In this study, the effects of using drop/fill method instead of overflow rinsing process on colorimetric and fastness properties of 100% cotton towel fabrics are investigated. It is found that, skipping to the drop fill rinsing method from the over flow rinsing process and obtained fresh water saving has no negative effect on colorimetric and color fastness values of the processed fabric samples and can be used conveniently in the industrial sized production. © Published under licence by IOP Publishing Ltd

Unsteady flow around two square cylinders in staggered arrangements

Paper presented at the 7th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Turkey, 19-21 July, 2010.In this study, the flow around two staggered square cylinders, placed in a uniform flow field, has been studied. The numerical simulations have been performed by use of a commercial CFD software Fluent. The Reynolds number, defined as a function of cylinder width D, has been chosen as 100 and 200. In the simulations, the dimensionless distance P/D, between the cylinder centers was changed from 2 to 5, and the incidence angle 8 also has been changed from 0' to 90' by 25' increments. In order to evaluate the flow field, isovorticity curves were obtained at different values of dimensionless distance P/D and incidence angle 8. The deviation of the mean drag coefficients and of the square root values of the lift coefficient with P/D and 8 also determined. The power spectrums of the lift coefficient have been obtained for different flow fields.ksb201