CFD simulation of flow pattern and plume dimensions in submerged condensation and reactive gas jets into a liquid bath

Ammonia concentration analysis for the steam condenser by combining two phase flow CFD simulation with condensation and process simulation

“…However, direct coupled analysis is very difficult and needs a lot of calculation time. The Computational Fluid Dynamics (CFD) method was used for simulating two-phase flow with condensation [1,2]. However, it is very difficult to consider phase equilibrium in CFD.…”

Experimental and computational fluid dynamic study of reacting gas jet in liquid: Flow pattern and heat transfer

“…To overcome this limitation, the two-fluid model (TFM) and multifluid model (MFM) were developed. The centerline velocity and temperature predicted by the TFM and MFM were relatively better than those predicted by the LHF (Chan, 1993;Gulawani et al, 2008). Though the phenomena of submerged reactive jet have been addressed satisfactorily using the reaction model (LHF, TFM and MFM) with the PDF formulation, the prediction of the correct equilibrium state relationship for the species at specific operating condition was still a major limitation.…”

“…In the previous literature, the focus was mainly on the estimation of plume dimensions and very limited information is available on the temperature and flow fields. Very few investigators (Chan and Abou-Ellail, 1991;Zhang et al, 2002;Gulawani et al, 2008) have compared the measured temperature and velocity profiles (and that too only centerline) with the predicted profiles of various models (LHF, TFM and MFM). Zhang et al (2002) and Gulawani et al (2008) have presented a comparison of the predicted centerline temperatures with the experimental data of Parnell et al (1989).…”

“…Chan (1993) and Gulawani et al (2007) have presented extensive reviews of modeling approach for various reaction jet systems. To improve the predictions of the abovementioned models, Gulawani et al (2008) considered the buoyancy effects on the flow along with the mass and momentum exchange between the phases and the CFD simulation using the k-e turbulence model. Their approach of modeling (i) the simultaneous heat and mass transfer accompanied by chemical reaction and (ii) the buoyancy effect was found to be in good agreement with the experimental High-speed photography to determine the size, stability and the growth rates of reaction zones Pressure measurements The plume exhibited a periodic change, involving spherical growth, axial expansion and necking often accompanied by detachment and collapse Periodic fluctuations similar to plume length were observed in the bath pressure measurements The plume length data for various bath concentrations, temperatures and pressures were correlated using a parameter that represents the dissipation of the reaction heat by the liquid entrained in the plume data.…”

“…Several aspects of the nonreactive (Lockwood and Naguib, 1975;Chen and Faeth, 1982;Gulawani et al, 2006) and the reactive (Mattavi et al, 1969;Biermann, 1975;Joshi and Sharma, 1976;Groff and Faeth, 1978;Hughes et al, 1983;Chen and Faeth, 1983;Chan et al, 1988;Chan and Shen, 1990;Chan and Chern, 1990;Chan, 1990;Chan and Abou Ellai, 1991;Zhang et al, 2002;Dahikar et al, 2007;Gulawani et al, 2007Gulawani et al, , 2008 jet flows have been investigated. Gulawani et al (2007) have provided an extensive review of the published work.…”