I want to build a flow hood for biology projects but a laminar flow HEPA costs more than I have in my bank account. There are cheaper HEPA filters out there but they don't produce laminar flow. The flow only needs to be laminar so eddies don't bring contaminates off dirty objects under the flow hood (my hands, equipment that can't be sterilized, etc) and onto biological samples, petri dishes, etc. If I increase the velocity of the air blowing through the flow hood, will the eddies form farther away or be blown away before they can transfer contaminates? Is there any way to turn turbulent flow into laminar flow?