Dimensionless Method to Characterize the Mixing Effects of Surcharged Manholes

Absence of a Hydraulic Threshold in Small-Diameter Surcharged Manholes

“…However, it is 127 expected that decreasing m / p below the ratios previously considered may ultimately result in the 128 elimination of the hydraulic threshold and the disappearance of the well-mixed below-threshold condition. 129 Stovin et al (2008 and2010) have demonstrated that it is feasible to utilize validated CFD models to 130 explore the flow field and solute transport regime for this type of system. This paper will therefore utilize a 131 validated CFD modelling methodology to explore the mixing characteristics of small-diameter surcharged 132 manholes.…”

“…Based primarily on CFD (Computational Fluid Dynamics)-derived CRTDs, Stovin et al (2010) suggested that 76 the solute transport characteristics of the surcharged manhole described above could be modelled by just 77 two normalized CRTDs, one for below-and the other for above-threshold surcharge. Guymer and Stovin 78 (2011) used deconvolution to reanalyse a portion of the laboratory data presented by Guymer et al, 79 (2005), confirming the validity of the two-CRTD model for manhole mixing.…”

A practical model to describe temporal variations in total suspended solids concentrations in highway runoff

“…In Phase 2, a direct evaluation against the UKHA/EA dataset was undertaken. Preliminary findings from Phases 1 and 2 were reported by Stovin et al (2010), and a summary of key conclusions is reproduced here.…”

“…The Stovin et al (2010) study suggested that the Kim et al (2005) model might usefully be reduced to a simpler two-parameter form, in which TSS is dependent upon the normalised cumulative proportion of total runoff volume, TSS(t)=f{v(t)}:…”

Applications of the concept of river tracer data similarity

“…Interestingly, the study of similarities and differences between nondimensional tracer residence time distributions has been mooted as a way of identifying flow regimes in urban drainage structures (Stovin et al . , ). It is not clear if there is any link between these nondimensional residence time distributions and the nondimensional profiles under study in the current paper.…”