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...

10 November 2018 6,394 17 View

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...

10 November 2018 1,726 19 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....

06 July 2018 2,618 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...

31 December 2017 6,869 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...

11 December 2017 3,685 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...

10 November 2017 5,060 7 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?

10 November 2017 2,888 3 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"...

08 September 2017 7,693 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?

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03 April 2017 770 1 View

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

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07 August 2016 3,416 0 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View