Recent content by MB613d

I feel you.. I've spent nearly two weeks now trying to solve it. It's above my knowledge and I tried to find similar problems in the library but couldn't find anything. I appreciate your help and I'm really happy about that.

The task is as follows: Determine the maximum pressure in tank 2 due to filling. I'm totally confused.

I see now. This is turning into a very complicated problem and its above my mathematical knowledge. All I want is to find out the maximum pressure. When do you think the pressure would me at a maximum? When the pump is running on full speed and the gas volume of V2 is at its lowest...

Thank you for your answer. I understand what you did there and I think it is correct. So do you think the pressure loss of the pipe is the pressure that needs to be established before gas begins to flow?

Thank you for your time! I'll have a look at it tomorrow morning. I'm going to bed now. Thank you!

As the temperature is constant the density will be constant. The ideal gas law takes the change of pressure and the moles into account. It does not use the density. If you are relating to the calculation for the pipe, that's the standard procedure to calculate the reynolds number. With time the...

I calculated the flow speed: w = V*4/PI() *d^2 = 4,7 m/s Then Reynolds number: Re = w * d * 1,29kg/m³ / 0,018 mPas = 49997 < 10^5 Blasius: Lambda = 0,3164 / Re ^0,25 = 0,0212 Zeta = 15 delta p = (zeta + lambda*l / d) + w^2 * 1,29 kg/m³ / 2 delta p = 254 Pa = 2,54 mbar Sorry I mixed up...

I think it does not make a difference. The pump pumps fluid from vessel 1 to vessel 2. The fluid pushes the air from vessel 2 to vessel 1. The pressure drop happens within the gas pipe from vessel 2 to vessel 1. Therefore the pressure in vessel 2 will be higher than in vessel 1. The parameter...

I used the ideal gas law to calculate the mass of the air within both vessels. First I calculated the mass of the air at p0 = 1,013 bar for both vessels. Then I calulated the mass of the air at po + Δp = 1,0155 bar for vessel 2 to find out how much air moves from vessel 1 to vessel 2. I took...

Exactly! Please excuse my english.

m1_p0 = 3231,13 kg (Mass of the air in vessel 1 at p0 pressure) m2_p0 = 6462,25 kg (Mass of the air in vessel 2 at p0 pressure) m2_p0+dp = 6478,20 kg (Mass of the air in vessel 2 at 101,55 kPa = p0+dp) delta_m2 = (m2_p0+dp) - (m2_p0) = 15,95 kg m1_p0 - delta_m2 = 3247,07 kg p1 = (3247,07 kg *...

Hey BvU I guess that would be correct if both vessels had the same volume. If I use my suggested method I get your proposed result. Thank you for welcoming me!

Homework Statement Two half with a fluid filled vessels are connected through two pipes in a closed system. The bottom pipe pumps the fluid from vessel 1 to vessel 2 at a rate of 300m³/h. The fluid pushes the air of vessel 2 through the top pipe into vessel 1. What is the pressure within the...