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Forum: Fluent UDF and Scheme Programming

June 14, 2018, 20:22

Replies: 13

UDF with differential equations

Views: 2,963

Posted By intied

I am not modelling the concentrations because of...

I am not modelling the concentrations because of I need to know only the temperature. For this reason, I had been thinking to solve the system of equations and get automatically the temperature....

Forum: Fluent UDF and Scheme Programming

June 14, 2018, 19:57

Replies: 13

UDF with differential equations

Views: 2,963

Posted By intied

x1 and x2 are dimensionless concentrations (from...

x1 and x2 are dimensionless concentrations (from 0 to 1). These variables represent chemical reactions. I am computing the transient increase of temperature due to these reactions.

Forum: Fluent UDF and Scheme Programming

June 14, 2018, 09:53

Replies: 13

UDF with differential equations

Views: 2,963

Posted By intied

UDF with differential equations (Edited)

Sorry, I forgot one term in each equation. The system of differential equations are as follow:

dx1/dt=x1*k1*exp(k2/(R*T)),
dx2/dt=x2*k3*exp(k4/R*T),

The source term is (dx1/dt+dx2/dt)*k5.

Forum: Fluent UDF and Scheme Programming

June 9, 2018, 13:43

Replies: 13

UDF with differential equations

Views: 2,963

Posted By intied

UDF with differential equations

Hi.
I am computing a source term of the energy equation in ANSYS Fluent.
How to add a system of differential equations in a UDF?
Each differential equation depends on time and temperature.
In...

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