Measuring diffusion coefficients of gaseous propane in heavy oil at elevated temperatures

Athar, Khan; Doranehgard, Mohammad Hossein; Eghbali, Sara; Dehghanpour, Hassan

doi:10.1007/s10973-019-08768-7

Cited by 20 publications

(6 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of the basic equations to determine the diffusion coefficient of gas in liquids is the Stokes-Einstein equation [35] According to which, the diffusion coefficient is directly proportional to the absolute temperature:…”

Section: Effect Of Temperature On Diffusion Coefficient Of Methane In...mentioning

confidence: 99%

Prediction of methane diffusion coefficient in water using molecular dynamics simulation

Moradi

Azizpour

Bahmanyar

et al. 2020

Heliyon

View full text Add to dashboard Cite

Section: Effect Of Temperature On Diffusion Coefficient Of Methane In...mentioning

confidence: 99%

Prediction of methane diffusion coefficient in water using molecular dynamics simulation

Moradi

Azizpour

Bahmanyar

et al. 2020

Heliyon

View full text Add to dashboard Cite

“…Consequently, as shown in Fig. 17, using swirl flow for hot co-flow causes CO production to decrease at the outlet of the burner [56,57].…”

Section: Resultsmentioning

confidence: 99%

Numerical Investigation of the Effects of Swirling Hot Co-Flow on MILD Combustion of a Hydrogen–Methane Blend

Mousavi

Kamali

Sotoudeh

et al. 2020

Journal of Energy Resources Technology

View full text Add to dashboard Cite

This paper examines the effects of swirl hot co-flow on the combustion behavior of a moderate or intense low oxygen dilution (MILD) burner fueled by a mixture of methane and hydrogen. Toward this goal, the realizable k-ɛ turbulence model, GRI. 2.11 reaction mechanism, and the discrete ordinates radiation model are incorporated into a computational modeling of the reactive flow. The numerical results are, first, favorably compared against the existing experimental data. Subsequently, a number of swirl co-flows are implemented, and structures of the resultant reactive flows are investigated systematically. The outcomes indicate that increasing the swirl velocity leads to the reduction of ignition delay and significantly enhances the reaction completion. The analysis of the spatial distribution of hydroxyl and formyl (OH and HCO) radicals reveals that swirling MILD combustion radially extends the reaction zone in comparison with the conventional MILD combustion. Yet, it reduces the length of the reactive region and allows for the occurrence of heat release in a shorter axial distance from the outlet fuel nozzle. Further, the addition of swirl reduces the production of carbon monoxide through its influences upon flow temperature and generation of formyl radical. However, it is found that swirling hot co-flow intensifies NOx emissions by strengthening of prompt and thermal mechanisms of NOx production. Reducing the temperature of the recycled flue gas is deemed to be an effective way of resolving this issue.

show abstract

“…This graph shows that with augmentation of k s the value of Nusselt number increases. This can be attributed to the increase in heat transfer between the fluid and the solid part of the porous medium, which is enhanced by boosting the conductivity of the porous solid [37,38]. Figure 13 shows the influences of power-law index upon the values of Nusselt number and total entropy generation against the Reynolds number.…”

Section: Parametric Studies On the Effects Of Physical Properties Of mentioning

confidence: 99%

Heat and mass transfer and thermodynamic analysis of power-law fluid flow in a porous microchannel

Sarafan

Alizadeh

Fattahi

et al. 2020

J Therm Anal Calorim

View full text Add to dashboard Cite

Transfer of heat and mass and thermodynamic irreversibilities are investigated in a porous, parallel-plate microreactor in which the working fluid is non-Newtonian. The investigated microreactor features thick flat walls with uneven thicknesses, which can be subject to different thermal loads. The dimensionless governing equations of the resultant asymmetric problem are first derived theoretically and then solved numerically by using a finite volume technique. This results in two-dimensional solutions for the velocity, temperature and concentration fields as well as the distributions of Nusselt number and local and total entropy generations. The results clearly demonstrate the significance of the numerical value of the power-law index and departure from Newtonian behavior of the fluid. In particular, it is shown that by increasing the value of power-law index the Nusselt number on the wall decreases. This leads to the intensification of the temperature gradients in the system and therefore magnifies the local and total entropy generations. Also, it is shown that the wall thickness and thermal asymmetry can majorly affect the heat transfer process and thermodynamic irreversibility of the microreactor. It is noted that the current work is the first comprehensive study of heat transfer and entropy generation in porous micro-chemical reactor with non-Newtonian, power-law fluid.

show abstract

Measuring diffusion coefficients of gaseous propane in heavy oil at elevated temperatures

Cited by 20 publications

References 30 publications

Prediction of methane diffusion coefficient in water using molecular dynamics simulation

Prediction of methane diffusion coefficient in water using molecular dynamics simulation

Numerical Investigation of the Effects of Swirling Hot Co-Flow on MILD Combustion of a Hydrogen–Methane Blend

Heat and mass transfer and thermodynamic analysis of power-law fluid flow in a porous microchannel

Contact Info

Product

Resources

About