Spacecraft Parachute Fluid Mechanics Computation Based on Space--Time Isogeometric Analysis With T-splines

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dc.contributor.advisorTezduyar, Tayfun Een_US
dc.creatorAvsar, Rehaen_US
dc.date.accessioned2021-12-06T20:10:00Zen_US
dc.date.available2021-12-06T20:10:00Zen_US
dc.date.created2021-12en_US
dc.date.issued2021-12-03en_US
dc.date.submittedDecember 2021en_US
dc.date.updated2021-12-06T20:10:00Zen_US
dc.description.abstractThis thesis is on fluid and structural mechanics computation of spacecraft parachutes based on isogeometric discretization with T-splines. Contrary to the non-uniform rational B-splines (NURBS), T-spline representation does not require a regular control grid, allowing a set of control points to end without traversing the whole domain. We generate a T-spline mesh directly from a block-structured NURBS mesh. In T-spline representation, we use knot removal at the unnecessarily refined regions of the NURBS mesh and reduce the number of control points. We use knot insertion at interfaces between nonmatching meshes. Then, having the matching pairs of control points on each side of the interface, we use knot removal to remove the other knots on the interface sides and enhance the continuity in the whole domain. This gives continuity, or increased continuity, to the volume mesh, improving the solution accuracy and reducing the total number of unknowns compared to NURBS computations. We first present, for a 2D parachute model, fluid--structure interaction computation based on the Space--Time Isogeometric Analysis (ST-IGA) with NURBS and T-splines. Then, we present spacecraft parachute incompressible- and compressible-flow computations based on the ST-IGA with T-splines.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationAvsar, Reha. "Spacecraft Parachute Fluid Mechanics Computation Based on Space--Time Isogeometric Analysis With T-splines." (2021) Diss., Rice University. <a href="https://hdl.handle.net/1911/111766">https://hdl.handle.net/1911/111766</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/111766en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectSpace--Timeen_US
dc.subjectIsogeometric Analysisen_US
dc.subjectT-splinesen_US
dc.subjectSpacecraft Parachutesen_US
dc.subjectComputational Fluid Dynamicsen_US
dc.subjectFluid--Structure Interactionen_US
dc.titleSpacecraft Parachute Fluid Mechanics Computation Based on Space--Time Isogeometric Analysis With T-splinesen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentMechanical Engineeringen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US
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