?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F655%2F&rft.title=Void+spaces+under+tubes+in+fluidized+beds&rft.creator=D.%2C+G.R.&rft.subject=Fluids&rft.description=A+mathematical+model+is+developed+to+understand+how+voids+form+under+tubes+in+fluidized+beds.++Gas+flow+in+the+fluidized+bed+is+assumed+to+be+governed+by+Darcy's+law+and+the+void+is+assumed+to+be+an+inviscid+fluid.+Two+cases+are+considered+depending+on+whether+there+is+gas+flow+through+the+void+boundary.&rft.date=1990&rft.type=Study+Group+Report&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F655%2F1%2Fp6.pdf&rft.identifier=++D.%2C+G.R.++(1990)+Void+spaces+under+tubes+in+fluidized+beds.++%5BStudy+Group+Report%5D+++++