Recent content by aladinlamp

ok, where is correct location of point B ?

Hi, I made some errors in setting up my initial conditions, so let's reevaluate them step by step. In the diagram, there are two points, A and B: Point A represents a 1-liter container filled with liquid ammonia at a pressure of 1 Bar and a temperature of 240 Kelvin. Heat, denoted as Q1, is...

Entry conditions: liquid ammonia , 1 bar , temp -34 celsius, i supply heat Q to heat it to 4.5 celsius, 10 bar, than i release it into empty vessel until inside reaches also 1 bar, expansion,adiabatic cooling, uses internal energy of ammonia to expand and cool itself 1. can we assume, after...

ok ,if the channel is 100km long, H1 is 1 meter H2 is zero, than slope angle along whole channel is really negligible as you can see in calculation for 1km part of the channel, it is 100x smaller angle so how can this molecular level slope drive the water forward Q on 100km long channel is not...

I don't understand what pressure are you talking about, its open channel flow not flow in the pipe

I want to know how it applies to this scenario u have long channel without slope H1 = H2 according to above, water closer to free fall should be slower and warmer, slower water would mean lower Q2, but that's not the case in reality since Q1=Q2 what am i missing here ?

Hi i want to understand effects of viscious drag of water in fixed cross section open channel flow. My understanding is water viscosity and channel surface create drag opposing movement of water, changing kinetic energy of water to heat. Result is warmer water and slower water flow. If the...

ok so you are saying , in this scenario,, if Q in = Q out, and V in = V out, there has to higher water level at inlet than at outlet, there is no other explanation

how can velocity out be smaller than velocity in

in case of wind turbines, exiting air has larger area and lower velocity than incoming, how is this applied to water in fixed crossection open channel, water cannot expand at exit, Q in has to be same as Q out , so velocity in should be same as velocity out

Hi, is Betz law fully applicable for hydro, hydrokinetic submerged turbines, since air is compressible but water is not ?

ok little side question when flow is initiated by height difference, liquid has to overcome viscosity, internal friction. does it mean, any liquid movement is causing liquid to heat up ? in perfect heat isolated system, moving liquid(water) will just gain heat and increase its temperature until...

Ok imagine 2 scenarios 1. Channels are empty and are being filled for the first time. What forces drive the liquid until it becomes big static lake? 2. Channels are filled but at the end of the channel water is being pumped out for irrigation. What drives the liquid to be replenished in the...

Hi what dynamics are moving liquid in open channel flow without slope (irrigation channels)? Are they mostly hydrostatic forces? imagine 2 scenarios 1. Channels are empty and are being filled for the first time. What forces drive the liquid until it becomes big static lake? 2. Channels are...

of course i tried all possible angles and orientations, nothing happend