MUODILAI BEFOSILAGI

MUODILAI BEFOSILAGI, dar gidrodinamika, yake az muo- dilahoi asosii mekhanikai muhithoi yaklukht, ki qonuni baqoi mascapo baroi hajmi dilkhohi moe (gaz)-i harakatkunanda ifoda mekunad. Dar mavridi istifodai tagyiryobandahoi Eyler (nigared Muodilahoi Eyler dar gidromekhanika) Muodilai befosilagi namudi zerin dorad:

(r — zichii moe, v — surati on dar nuqtai dodashuda, v_x, v_y, v_z — proeksiyahoi surat ba tirhoi ko­ordinata). Agar moe fishurdanashavanda boshad (r =■ const), namudi Muodilai befosilagi chunin meshavad:

Baroi jarayoni muqarrarshudai yaksamtai moe (gaz) dar lula, ka­nal va gayra, ki burishi kundalangashon S ast, Muodilai befosilagi qonuni doimiyati kharji moe (gaz) pSv *= const-po ifoda mekunad.