This is Sahaj from Ahmedabad, India.
I've been trying to simulate a nozzle with one inlet and 48 small exit holes. I've created a domain around the nozzle with a single exit face instead of 48 individual exits to study the flow behavior inside it, but I'm getting inaccurate results as compared to the practical data. Small variation is allowed but the simulation results are almost doubled than those obtained in a lab test! Practical data shows velocities to be roughly 25-30m/s whereas SolidWorks states it to be 70-80m/s. Increasing the initial mesh accuracy increases the values even further.
What could possibly be wrong? I've attached an image to give you an idea about it. Am I performing the simulation incorrectly? What would be a work around for this?
Any help would be appreciated.