Kemal Büyükakın

14 Questions 19 Answers 0 Followers

Questions related from Kemal Büyükakın

Is the reaction rate constant, k(T), of a chemical reaction affected by the kind of a third inert species, under the constant temperature condition?

Is the reaction rate constant, k(T), of a molecular chemical reaction affected by the kind of a third inert species (CO2 or N2 for example) under the constant temperature condition ? The reaction...

11 November 2018 1,775 19 View

Can we use methane-air chemical mechanism, which includes H2 oxidation mechanism as a submechanism, for a H2 combustion simulation with CFD?

Can we use methane-air chemical mechanism, which includes H2 oxidation mechanism as a submechanism, for a pure H2 combustion simulation or H2 enriched methane combustion simulation with CFD? Do...

11 November 2018 6,452 17 View

Why does the mixture fraction combustion model overpredicts the outlet temperature in a natural gas boiler, according to the experimental datas?

I am simulating natural gas combustion in ANSYS Fluent. If i use the mixture fraction combustion model, the outlet temperature of the boiler is overpredicted according to the experimental datas....

07 July 2018 2,658 4 View

I am simulating methane - air combustion on Ansys Fluent. I use DO radiation model. Radiation residual diverges?

I am simulating methane - air combustion on Ansys Fluent. I use DO radiation model. For the first 700 iterations, the solution continuously converges. But later, the radiation residual suddenly...

01 January 2018 6,936 6 View

I am simulating methane - air combustion on Ansys Fluent. I use DO radiation model. I got all the residuals converged except radiation residual?

I am simulating methane - air combustion on Ansys Fluent. I use DO radiation model. I got all the residuals converged except radiation residual. The results look reasonable. The total heat...

12 December 2017 3,730 3 View

On your experience, what is the most preferable radiation heat transfer model for a combusting medium in Ansys Fluent?

On your experience, what is the most preferable radiation heat transfer model for a combusting medium (e.g. natural gas-air) in Ansys Fluent?

11 November 2017 2,928 3 View

I am looking for a skeletal methane combustion mechanism in chemkin format, which has 17 species and 25 reactions. Where can i get it?

I am looking for a skeletal methane combustion mechanism in chemkin format, which has 17 species and 25 reactions. I have searched through many web sites but i can't get it. It is propably called...

11 November 2017 5,134 7 View

Solution is converged for my cold flow analysis (methane-air) on Fluent, but the results look nonphysical ?

I'm simulating a cold flow analysis (methane-air) on fluent, using species transport model. The model has around 5 millions meshes with tetrahedrons and swept bodies. I use "realizable k-epsilon"...

09 September 2017 7,734 6 View

Why is a turbulent flow always inherently unsteady,even if the all conditions in the flow system are kept constant?What is the physical reason for it?

04 April 2017 844 1 View

What is the difference between thermodiffusion coefficient DT and thermodiffusion coefficient for a particular species DT,i?

Jx=-rho*DT*co(1-co)*DelT (Mass flux due to thermal gradient). DT coefficient in this equation is not same with DT,i or DT,j given in the equation in the attached jpg. What is the relation between...

11 November 2016 3,187 0 View

What is the definition of the global reaction and semi-global reaction?

08 August 2016 3,455 0 View

What is the definition of swirl number for swirlers used in burners? What is it used for?

04 April 2016 3,099 1 View

What is the definition of swirl number for swirlers used in burners? What is it used for?

01 January 2016 4,160 1 View

For a thermally fully developed pipe flow, why would the first derivative of non dimensional temperature to axial direction be zero?How is it proved?

Ts= Surface Temperature Tm= Mean Temperature

10 October 2015 1,103 2 View