Flow work Definition and 15 Threads

App.js: import React from 'react' import Helloworld from './components/HelloWorld'; import Users from "./components/Users"; const App = () => { return ( <div> <h1>List of Users</h1> <Users name="Zino Emi" job="Developer" /> <Users name="Lionel Messi" job="Web Developer"...

Promises syntax that I learnt: let p = new Promise(function (resolve, reject) { let x = 20, y = 20; if (x == y) { resolve(); } else { reject(); } })p.then(function () { console.log("that's correct"); }) .catch(function () { console.log("that's not correct"); }) I...

I'm trying to solve a problem where a perfect ideal gas is entering an initially evacuated rigid vessel. The input pressure and temperature are Pi and Ti which are constant. The incoming mass Mi is an arbitrary function of time. When i solve this, i get the temperature inside the container as...

As per work energy principle, the energy spent in moving an object is stored as kinetic energy.Flow work is done to make the fluid move.Why is it not included in kinetic energy (i.e) why kinetic energy and flow work are considered seperately?

In case of isobaric expansion, the system expands at constant pressure(the external pressure i.e. the resistance is constant.).In case of flow work, the fluid trying to exit the control volume, pushes against the pressure at the exit of the control volume or when entering the control volume, the...

I am struggling to fully grasp the concept of flow work for a non-deformabable control volume. Nearly every source puts it in this way: flow work is the work required to push fluid into and out of the control volume and as such is defined as Pv on a unit mass basis. But how can this work be...

Why is the pressure used in flow work the pressure of the fluid? If the fluid was say at 10kPa and the external pressure was at 0Pa, why don't we use the 0Pa in our calculations for flow work, since it's the external pressure that's the resistance? Or is it not possible to have this difference...

Considering horizontal flow in a pipe (under the action of pressure forces only) if we focus on a fluid element we have a pressure gradient across the same i.e, a net pressure force will always act over the element that essentially maintains the flow.Now, in a region in the flow field if the...

Hello friends, Referring to the attachment it can be clearly understood that flow work in an open system is a form of the PdV work defined as the boundary work or displacement work for a closed system. Does that mean PdV work is valid for both a closed system and an open system?

Hello, I've recently started reading about circuits. It was going good until I got to the idea of Conventional Flow. It confused me so I googled it and I can understand that people are used to it and scientists didn't know what an electron was when they thought about what was going on in...

Tomita time is an intrinsic observer-independent time variable available to us for fully general relativistic analysis. As far as I know it is the only such time available for things like general covariant statistical mechanics GC statistical quantum mechanics GC quantum field theory Here I...

Hi I was wondering, for the first law most books have basically Q - W = deltaUsystem + deltaH + deltaKE + deltaPE. Assuming steady state and negligible PE change, we just have deltaH and deltaKE. I was wondering, since H includes flow work (in the form of PV), why is KE still part of the...

In the chapter relative to First law applied to flow processes, my book explains the "Flow Work" which appears in the energy balance, as work needed to push a volume of fluid into (and out of) the control volume. It also says that it's equal to pV, and then it is added to the internal energy U...

For an open system with mass flowing in and out, where mass exits the system there is work associated with the mass transport. When this work is used to say, push up a piston, this is pretty intuitive, but even when it does not lift a weight since, the force COULD be used to lift a weight, it is...

Hi Im trying to understand the justification for flow work for a control volumen considering the 1. law of thermodynamics. \[\begin{array}{l} \frac{d}{{dt}}(me) + \sum {{{(e\dot m)}_{out}}} - \sum {{{(e\dot m)}_{in}} = \dot Q + \dot W} + {{\dot W}_{fw}}\\ {{\dot W}_{fw}} = \sum...