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- W2389835733 abstract "The two-dimensional phase change temperature field of petroleum pipelines in seasonally frozen ground regions under severe climate conditions is studied. Through conformal mapping w=F(z) , the irregular boundary configuration is adjusted into regular one and general form of unsteady phase change heat conduction and interface energy-balance equation on mapping coordinate are derived as following:α-iΔT-i=dwdz+{-2}T-it1h-r(k-sT-sγ-k-lT-lγ)=ρLdwdz+{-2}s(θ, t)t Singular perturbation method is used to solve unsteady phase change temperature question. The perturbation parameter e used in the expansion solution is as e=c-s(T-f-T-w)/L. The zero-order expansion term of frozen and thawed phase and interface equation are solved. Because the factor of the term vt in the zero-order thawed phase equation is a function of dwdz, Galerkin's method is used to solve the perturbation equation. Besides researching the temperature field of oil-pipeline system, the thermal parameter relating to temperature and numerical examples are also discussed." @default.
- W2389835733 created "2016-06-24" @default.
- W2389835733 creator A5043939405 @default.
- W2389835733 date "2003-01-01" @default.
- W2389835733 modified "2023-09-25" @default.
- W2389835733 title "A Singular Perturbation Method of Phase Change Temperature of Petroleum Pipeline in Seasonally Frozen Ground Regions for Irregular Boundary Configuration" @default.
- W2389835733 hasPublicationYear "2003" @default.
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