I have an old 600 gallon liquid nitrogen dewar. I'm worried that it is possible for the pump on the truck that fills it to over pressurize the vessel. Its MAWP is 250 psig. BOC has the contract for filling our dewars (tanks), however I have not been able to get a pump curve for one of their...
I have a helium super leak that is too small to locate. Some suggested coating all the connections with the brand name Estane polyurethane. You mix 10 g Estane with 50 g methylene chloride and 50 g acetone and paint the solution on the suspected leak areas. Has anyone tried fixing a very...
I have a helium super leak that is too small to locate. Someone suggested coating all the connections with the brand name Estane polyurethane. You mix 10 g Estane with 50 g methylene chloride and 50 g acetone and paint the solution on the suspected leak areas. Has anyone tried fixing a very...
Thanks, I will look there. I was thinking that if I divided the flow area into a number of smaller channels and then divided the flow accordingly this would be a conservative upper bound pressure drop estimate. I thought this because that would be increasing the surface area.
I have a cooling application where I want to flow air thru a rectangular channel with an extreme aspect ratio. The channel would be 0.75 in. x 148 in. Typically books say to use (cross sectional area)/(wetted perimeter) for the hydraulic radius. For this sort of configuration the hydraulic...
