تفاوت بین انرژی جنبشی و انرژی جریان چیست؟


پاسخ 1:

انرژی جنبشی توسط استاندارد داده می شود

12mv2\frac{1}{2}mv^2

Flowenergyhowever,isadifferentthing.ItstheenergythatallowsfortheabilitytodowhatscalledPdvwork,where[math]P[/math]ispressureand[math]dv[/math]isadifferentialchangeinvolume,specificallytheformof[math]Pdv[/math]workthatscalledflowwork,whereafluidaddsvolumetoasystemasitentersandthenreducesthevolumeofasystemasitleaves.Flow energy however, is a different thing. It’s the energy that allows for the ability to do what’s called Pdv work, where [math]P[/math] is pressure and [math]dv[/math] is a differential change in volume, specifically the form of [math]Pdv[/math] work that’s called flow work, where a fluid adds volume to a system as it enters and then reduces the volume of a system as it leaves.

به عنوان مثال ، اگر یک مایع با سرعت و فشار خاصی وارد سیستم شود و به قسمت بیشتری از لوله وارد شود ، به این معنی است که فشار مایع در حال افزایش است و سرعت رو به کاهش است (به شرط اینکه انواع دیگر تلفات ناچیز باشد). ، این بدان معنی است که شما انرژی جنبشی (سرعت) را به انرژی جریان (فشار و حجم) تبدیل کرده اید.

EnthalpyU+PVisthesumoftheinternalenergyandtheflowenergy,andismostcommonlyusedforisobaricprocesses(wherethechangeinenthalpyisequaltoheattransfer)orforopensystemprocessesoperatingatsteadystate,wherestandardvaluesareconvenientformorequicklyfiguringoutexternalworkrequired(orproduced)byaspecificprocess.Enthalpy U+PV is the sum of the internal energy and the flow energy, and is most commonly used for isobaric processes (where the change in enthalpy is equal to heat transfer) or for open system processes operating at steady state, where standard values are convenient for more quickly figuring out external work required (or produced) by a specific process.