The region of flow over which the t

The region of flow over which the thermal boundarylayer develops and reaches the tube center is
called the thermal entry region, and the length of thisregion is called the thermal entry length. The region in which the flow is both hydrodynamically (the velocity profile is fully developed and remains unchanged) and thermally (the dimensionless temperature profileremains unchanged) developed is called the fully developed region

Hasil (Bahasa Indonesia) 1:

Daerah aliran yang boundarylayer termal mengembangkan dan mencapai pusat tabung disebut wilayah termal entri, dan panjang thisregion disebut panjang masuk termal. Wilayah di mana aliran adalah keduanya hydrodynamically (profil kecepatan sepenuhnya dikembangkan dan tetap tidak berubah) dan thermally (profileremains berdimensi suhu yang tidak berubah) dikembangkan adalah disebut wilayah sepenuhnya dikembangkan