beetle radiator
 

Hi!

I'm trying to model a beetle radiator. it's an air cooled oil radiator. I drew the model in gambit. I have two different channels which have the flows of oil and air. oil enters at 120C and exits at 105C while the air gets hot. No matter the numbers, How can I run fluent with these conditions? which model should I use? I always get the "floating point error:invalid number" error. Please help me and tell me what should I do detailly. If any of you are interested, i can send you what i've done and and we can work together

thanks.