I couldn't run the flow simulation due to low memory, how do I resolve or modify this?

I'm facing a problem while running a flow simulation, it's automatically terminating with a warning about low memory. I've tried looking for online solutions and customised system settings but still couldn't run the model to see if the results are close to what is estimated. Alternatively, I have scaled down the model to 25% to check if this changes but still couldn't get any results. Attached screenshots. What am I doing wrong, what should I do alternately?