Should the number of nodes (nNodes) divided by the length of the dynamic pipe be greater than 1?
I’ve been using Open Modelica for a few months now, primarily modeling thermo-hydraulic systems. I’ve noticed that when the ratio of the pipe’s length to the number of nodes (nnodes) in the dynamic pipe is less than 1, the model fails to initialize and displays the error “error 0xfffffffffffffff.”
Have you encountered this issue as well?
In OpenModelica, is there a constant component that can take multiple input values?
in the model below i have a convection component that is composed of 4 elements (table(4,1)). what i did is define the product and the const componant as a table of 4 elemnts but the coefficient table do not accept this definition.
is there any way to calculate the product of the constant “const” and a intrepoleted value from the coeffcient table and inserted as GC input for the convection components
How to Choose Dynamics Options for Dynamic Pipes?
Below is a model of two parallel flows exchanging heat through convection with varying boundary conditions.
Error When Adding Heat Capacitor in Modelica Simulation – How to Debug?
Below is a simplified version of a model I’m working on. In this model, two parallel dynamic pipes exchange heat through convection with a flow composed of two dynamic pipes. The system has been simplified, and the values used are arbitrary to maintain confidentiality.
How to define pressure drop in complexe model?
I’m working on a very complex thermohydraulic model with parallel flows from more than three sources. In my current setup, I’m using the orifice component to define and scale the pressure drop.
Array dimensions must be known at compile time – Error Modelica
🙂
Why do I get this error from Modelica:
Is there a way to define Boundary_pT with a two-phase water?
I’m trying to study a two-phase flow problem where, at the source, I have a quantity x of the mass flow as vapor. From what I understand, the “fixed composition value” “X” can help define this, but in my code, if I apply 0.95 (95% of my flow as fluid), I get the following error:
Is it possible to model two-phase flow in a model with dynamic pipe?
Does anyone have an example of a two-phase flow model with dynamic pipe?
OMC in openmeodica outputs incorrect parameters in csv file
I wrote an oms script, but I am not getting correct output described by my script. In the script I wanted to save parameters (“building_load.p”, “grid.sou.S[1]”, “generator.P”) to a csv file, so I ran this script.
How to develop a 2D convection-diffusion component for mass transport
I am working on a kind of plug flow reactor in which I have an unidirectional flow (let’s say, from bottom to top), but there is also mass transfer due to diffusion on the sides with the adjacent components, as in the figure below.