hello guys,

i am new to solidworks flow simulation but not new to fluid mechanics, i started learning the flow simulation using the SolidProfessor package about flow simulation

so i would like to ask some questions about the information window we see while running the calculation

1 - there is an line that says : "iterations per 1 travel : 193" what does this mean exactly ? is it that it needs 193 iterations to complete the simulation ?

2 - how to know the exact solving time it needs to finish ? because the time keeps jumping which i think is due to change in geometry surface

3 - i am simulating an F1 model of 1.4 meter in length and 0.5m in width which i placed it on a rectangle that represents the track, so i defined a domain around that is not much big and in contact with the road but not englobing the track rectangle, so my question is : Defining a less computational domain would result in less time to solve the calculations ?

4 - i did not understand the difference between "Global Goals" and "Surface Goals", can anyone please explain it ?

5 - i chose the surface goals because from a search on youtube and google i found that it has been chosen for cars simulations, so i chose the lift force or "force in y" and the drag force or "force in z" in solidworks so the results i will get are for the average force on all the car ? if i want to calculate the Drag coefficient using the formula of the drag force which i got in the simulation is that possible taking the highest force for example ?

6 - what does CPU value 8 means ? i keept it as the default value which was 8 and i chose accuracy of 1 the very low because if not it will take me ages to finish the calculation and now the main goal for me is to show that i understand the formulas i am using that is all

thank you everyone in advance

Some of these questions can be answered by checking the help documentation in the software.

1. Travel time: this is a certain unit of time that is defined by your mesh density and initial conditions, check the documentation.

2. There is no way to know exactly how long a simulation will take to converge, the value the software gives you is a best estimate based on current convergence trends of your stated goals.

3. For domain size, consider how you would test this model in a wind tunnel. How far do the walls need to be in order not to interfere with your model? Treat the software like a virtual experiment, and take the same considerations and cares as you would performing a real experiment.

4. Global goals will be calculated based on global values, that is to say the min/max/average value of every cell in the domain. Surface goals are based on integral values calculated on a specified surface in your model.

5. This is a more in-depth question that depends on the specifics of your simulation, maybe open a new thread for this.

6. CPU value means how many processing threads the simulation will make use of. The default is the maximum detected by the program. I'm guessing you either have 8 cores or 4 hyper-threaded cores on your motherboard.