Umbhobho wensimbi ye-Fluid luhlobo lwepayipi yensimbi enecandelo elingenanto kwaye akukho weld ukusuka ekuqaleni ukuya ekupheleni. Umbhobho wentsimbi olwelo unecandelo elinomngxuma, elisetyenziswa ngokubanzi njengombhobho wokuhambisa ulwelo, umbhobho wokuhambisa ioyile, igesi yendalo, igesi, amanzi kunye nezinye izinto eziqinileyo.