Creating a time variant velocity formula for a inlet


#1

https://www.simscale.com/projects/damiduz/dummy_new_ren/

for this, i need to add a variant velocity like starting from 0 and gradually increase up to 100 kmh-1 within 5 minutes time. can someone help me with the setting up the settings?


#2

Hey @damiduz,
i think you need a csv file like this, or you use a linear funktion ?

Greetz Kai


#3

Thanks for your input @Kai_himself!! :slight_smile:

He is right @damiduz, you can either use a CSV table upload or define a function (f(t,x,…)) to prescribe time dependent BC. Let us know if you have any further questions!

Enjoy your weekend!

Jousef


#4

how can i create a CSV file ?


#5

Hi @damiduz,

You can do so in Microsoft Excel. Make sure to save the file as CSV.

Cheers.

Regards,
Barry


#6

i am going to run this for 4000 itterations. do i have to define all 4000 one by one.


#7

Hi @damiduz,

According to what I see in @Kai_himself’s post, yes it does seem like so. Excel has functions which will help with making this job easy so it shouldn’t be too much of a hassle.

Cheers.

Regards,
Barry


#8

what it the function ?


#9

I think a linear funktion y=mx+b, (1/3)(x*t),x=1 so you got a linear funktion from 0 to 100kmh in 300 seconds (5 min)

Greetz Kai