A large truck overturns and spills liquid insecticide over a field. If the mass diffusivity of the fluid in the soil is 1 x10³ m²/s and the fluid remains on the soil for 30 minutes before evaporating into the air: a. Determine the maximum depth at which insect life is likely to be destroyed if a concentration of 0.0047% will destroy most of life. b. Calculate and plot the flux profile (as a function of z) at t=10 minutes and t= 30 minutes. Properly label all axes and include figure legend to receive full credit. tissue O2 gas r=R₁ 4igThe mass transport of oxygen (O2) to the r=R₂ find fisindrical tu what design oxygen to tissue consideration. Pure oxygen (O2) gas flows through the tube and at steady state supplies oxygen to the surrounding tissue. The tube wall is extremely permeable to O2, and the O2 partial 2' pressure through the porous tube wall can be taken as the O2 partial pressure inside the tube. Oxygen is only sparingly soluble in the tissue, which is mostly water. The dissolved O2 diffuses through the tissue and for the purpose of this problem lets ignore the metabolic consumption component. Assume the partial pressure of oxygen in the tube is 90 mmHg; and the concentration at R₂ is 10% of the concentration at R₁. a. Simplify the 3D mass transport equation for the given situation. List the assumptions made and why. b. Solve for the concentration profile c✓(r).

Aquaculture Science

3rd Edition

ISBN:9781133558347

Author:Parker

Publisher:Parker

Chapter12: Water Requirements For Aquaculture

Section: Chapter Questions

Problem 7KA

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Transcribed Image Text:A large truck overturns and spills liquid insecticide over a field. If the mass diffusivity of the fluid in the soil is 1 x10³ m²/s and the fluid remains on the soil for 30 minutes before evaporating into the air: a. Determine the maximum depth at which insect life is likely to be destroyed if a concentration of 0.0047% will destroy most of life. b. Calculate and plot the flux profile (as a function of z) at t=10 minutes and t= 30 minutes. Properly label all axes and include figure legend to receive full credit. tissue O2 gas r=R₁ 4igThe mass transport of oxygen (O2) to the r=R₂ find fisindrical tu what design oxygen to tissue consideration. Pure oxygen (O2) gas flows through the tube and at steady state supplies oxygen to the surrounding tissue. The tube wall is extremely permeable to O2, and the O2 partial 2' pressure through the porous tube wall can be taken as the O2 partial pressure inside the tube. Oxygen is only sparingly soluble in the tissue, which is mostly water. The dissolved O2 diffuses through the tissue and for the purpose of this problem lets ignore the metabolic consumption component. Assume the partial pressure of oxygen in the tube is 90 mmHg; and the concentration at R₂ is 10% of the concentration at R₁. a. Simplify the 3D mass transport equation for the given situation. List the assumptions made and why. b. Solve for the concentration profile c✓(r).

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