2-stroke engine combustion
 

Hello,

In .info file I get following warnings. 1)#060-DENSITY OUT OF BOUND DUE TO PRESSURE CORRECTION 2)#060-NEGETIVE DENSITIES FOUND 3)#065-OUT OF BOUND VALUE FOR SCALAR VARIABLE ENTH.

Right after these warnings my solution diverges.

I would really appreciate if you can help me.

Re: 2-stroke engine combustion
 

Hello friend,

I am working in 2 stroke engines filed. already i have developed a 2 stroke diesel engine for low powered application ( my diesel engine has a Spark pllug !)

I am passisionate about 2 stroke engines ...i hold a degree in car engineering .I know CFD packages Fluent and ANSYS.. If u could send me the CD ( compact disc ) of STAR-CD i will learn that software too and we both can work on it.

Re: 2-stroke engine combustion
 

Hi,

I shall ask my prof. if he let me borrow the CD.

Meanwhile, Can you advise me how to set boundary conditions in the connecting region between combustion chamber and inlet/exhaust ports? I guess reason behind above errors is boundry condition.

Thanks in advance.

Re: 2-stroke engine combustion
 

hi I get the same error! I am workin on unsteady state flow simulation in exhaust manifold by CFD,. did u find any clue for it?

Re: 2-stroke engine combustion
 

Hi Mohsen,

Poor me. I am still trying to solve that negetive dinsity error, the only thing I inproved is previously I was getting this error at the first event of expansion stroke but now I somehow managed to rich few more events in expansion stroke,till when ports attach to the cylinder(2-stroke engine). Then same old error. What I did was refined my mesh and decrease the time scale.

Wish you good luck my friend.

2-stroke engine combustion Influence of Humidity
 

Dear Sir,

I am interested in getting information in the comparison readings under differents ambients conditions, since we have tracks at different barometric pressure and humidity.

Let´s start to talk about.

My best regards thank,