Thermal Performance Assessment of Turbulent Tube Flow Through Wire Coil Turbulators

Heat transfer coefficients of laminar, transitional, quasi-turbulent and turbulent flow in circular tubes

“…This study Literature [3, 16, 17, 20, 23, 29, 32, 39, 84- Comparing the experimental data of this study in Fig. 7 with the experimental data from literature [3,16,17,20,23,29,39,[84][85][86][87][88][89] in Fig. 8, significant scatter can be observed in Fig.…”

“…Furthermore, Eq. ( 28) was able to predict 34% of the experimental data from literature [3,16,17,20,23,29,39,[84][85][86][87][88][89] within errors of 10% and 63% of the data points within 20% errors. It should also be noted from the very strong relationship between friction factors and Colburn jfactors (as was shown by Everts and Meyer [49] and Meyer and Abolarin [62]), that it can be postulated that Eq.…”

“…The existing correlations in literature were evaluated using the experimental data of this study (Fig. 7) as well as experimental data from literature [3,16,17,20,23,29,39,[84][85][86][87][88][89] (Fig. 8).…”

Modeling a process combining a cereal dryer with a bioenergy unit for equipment design in developing countries

“…The hot flue gas temperature at the primary circuit inlet ( T ip ) is set at 640 °C, and the radius of the fan impeller ( R s ) is set at 75 mm. In solution S1, the tubes are not equipped with a turbulator; a “wire coil turbulator” profile (Eiamsa‐Ard, Kongkaitpaiboon, & Promvonge, ) was chosen for solution S2, while solutions S3–S6 use different elliptic turbulator variants (by angle [ α ] and free sectional flow between turbulator and tube [Δ S ]). The radius of the hot flue gas extractor impeller ( R p ) is defined so that the six solutions are compared based on the same power supplied by the generator.…”

Determining heat transfer correlations for transition and turbulent flow in ducts

“…(10) in conjunction with the formulas (11) and (12). Furthermore, the friction factor was calculated from the formula (29) with experimental data by Buyukalaca et al [2] and Eiamsa-Ard et al [4] and the method of calculation proposed by Gnielinski [8] An inspection of the results shown in Fig. 2 indicates that for small Reynolds numbers the use of the experimental velocity distribution (14) given by Reichardt to calculate the friction factor ξ for small Reynolds numbers gives very satisfactory results.…”