Getting NaN values from the model using FMPy Question: I’m running an FMU export from Simcenter that runs on 5e-7 step-size in FMPy. However, after a few steps the FMU starts returning NaN values. My expectation is that this is due to the way I am using FMPy, but I am unable to solve it …
How to join two objects to share values but maintain the original name? Aka N-body merger Question: As the title says, I am working on an N-body simulation I found on YouTube. The current script has gravity turned off when radius is small enough. However, I’d like to join the two objects (body and otherbody) …
Something goes wrong calculating the slope of the simulation Question: In this python code we are trying to simulate the path of a frisbee that is being shot from a shooter with a certain angle (alpha0). The angle of attack should be the angle at which its being shot, minus the slope of its path. …
Simulating factory manufacture with simpy by requesting multiple resources at the same time, but running for different time Question: I was trying to simulate a factory manufacturing different products with different machines with simpy. For each product, we will need to allocate different machines for production. For example, the first product will ask for machines …
Generate a running tally with Polars where the closing balance one month becomes the opening balance for the next month Question: I want to generate a simulation of a running tally over a period of time given an initial opening balance. By example, an imaginary business starts with $1000 and experiences a random profit and …
Why does the moon spiral towards Earth in simulation? Question: I am trying to simulate a somewhat realistic program where Earth and the moon can interact gravitationally with each other. Now the problem is that the moon keeps on spiraling towards Earth and I don’t understand why. This is my code: from math import sin,cos,sqrt,atan2,pi …
Simpy: Callcenter simulation – inactive call timeout Question: currently I am working on a more or less complex callcenter simulation. I am quite new to Simpy and have a problem with timing out calls if no agent could answer them. In my simulation I generate calls in 4 different queues. Each of them should have …
How to simulate a heat diffusion on a rectangular ring with FiPy? Question: I am new to solving a PDE and experimenting with a heat diffusion on a copper body of a rectangular ring shape using FiPy. And this is a plot of simulation result at some times. I am using the Grid2D() for a …
How to see a distribution of outcomes of a while loop? Question: Imagine you have a while loop that includes a random outcome so that the output of the while loop is different each time. How can you simulate the while loop many times and see the distribution of outcomes? I know how to run …
Bioreactor Simulation for Ethanol Production using GEKKO Question: I am trying to simulate a DAE system that solves a fed-batch bioreactor problem for ethanol production using GEKKO. This is done so I can later optimize it more easily to maximize Ethanol production. It was previously solved in MATLAB and produced the results as shown in …
