PhD-position at the Department of Energy and Process Engineering (Mass transfer in transient multiphase flow models)
Background
The area of the suggested work is within 1D transient flow models for flowing gas-liquid mixtures in pipes. Such models are based on numerical integration of conservation laws in time and along the pipe. Development of computer models then typically involve formulation of the base equations (two fluid models or mixture models), formulation of closure laws (friction models or slip relations) and testing of numerical methods (front capturing or front tracking methods, sequential or iterative solutions, low or high order schemes).
One particular issue is the formulation and implementation of mass transfer in the multiphase flow models. Instead of assuming thermal equilibrium between the phases, we will test schemes based on non-equilibrium mass transfer models.
The PhD research fellowship is awarded for a total of 4 years, including 25 % teaching assistance at bachelor’s and master’s degree level.
Objective
The objective of the work is to explore different computational concepts for mass transfer in dynamic multiphase flow models.
Areas of application
There will be two particular application areas for the research tasks. The main area is the multiphase transport of oil and gas in wells and sub-sea pipelines, where mass transfer often is the cause for the transition from single phase to two phase flow. The other area is heat transfer equipment, with boiling and condensation, and a particular application is the heat transfer in concentrating solar energy collectors.
Links to other projects
The work will relate to our activities with oil companies on multiphase transport, see the link for further information http://www.ept.ntnu.no/multiphase
We also foresee experimental activity on heat/mass transfer in a project on solar energy, where thermal energy is collected in a concentrating parabola dish and transported to a high temperature storage unit. There is a need for modelling natural flows in boiling systems as well as in heat pipes. See the link for some information on the solar project, which is a collaboration with African universities: http://www.ept.ntnu.no/NUFUSolar
Candidate
The candidate must have a strong interest in computational methods and programming. Suitable background can be within computational physics, fluid mechanics, mechanical or chemical engineering. Applicants for PhD grants should have an MSc or similar degree within relevant engineering or technology areas, and must be qualified for a PhD study at NTNU.
Further information can be obtained by contacting Professor Ole Jørgen Nydal, email: ole.j.nydal@ntnu.no.
Conditions of appointment:
PhD students follow code 1017, grade 43 – 47, gross NOK 325 600 to NOK 348 900 per year (before tax). PhD students are normally remunerated at wage level 43. There will be a 2 % deduction to the Norwegian Public Service Pension Fund from gross salary.
Engagement as a PhD candidate is done in accordance with current appointment regulations with supplementary rules in force giving guidelines for scholarship appointments in universities and university colleges. The goal of each of the announced positions is to obtain a PhD degree. Applicants are obliged to engage in an organized PhD training program, and appointment requires approval of the applicant’s plan for a PhD study within three months from the date of commencement. A contract of employment will be set up for the engagement period regulating the rights and duties of the PhD student.
The engagement is to be made in accordance with the regulations in force concerning State Employees and Civil Servants.
The positions adhere to the Norwegian Government’s policy of balanced ethnicity, age and gender. Persons with immigrant background and women are encouraged to apply.
The application must contain information of educational background and work experience. Copies of transcripts and reference letters should be enclosed.
Background
The area of the suggested work is within 1D transient flow models for flowing gas-liquid mixtures in pipes. Such models are based on numerical integration of conservation laws in time and along the pipe. Development of computer models then typically involve formulation of the base equations (two fluid models or mixture models), formulation of closure laws (friction models or slip relations) and testing of numerical methods (front capturing or front tracking methods, sequential or iterative solutions, low or high order schemes).
One particular issue is the formulation and implementation of mass transfer in the multiphase flow models. Instead of assuming thermal equilibrium between the phases, we will test schemes based on non-equilibrium mass transfer models.
The PhD research fellowship is awarded for a total of 4 years, including 25 % teaching assistance at bachelor’s and master’s degree level.
Objective
The objective of the work is to explore different computational concepts for mass transfer in dynamic multiphase flow models.
Areas of application
There will be two particular application areas for the research tasks. The main area is the multiphase transport of oil and gas in wells and sub-sea pipelines, where mass transfer often is the cause for the transition from single phase to two phase flow. The other area is heat transfer equipment, with boiling and condensation, and a particular application is the heat transfer in concentrating solar energy collectors.
Links to other projects
The work will relate to our activities with oil companies on multiphase transport, see the link for further information http://www.ept.ntnu.no/multiphase
We also foresee experimental activity on heat/mass transfer in a project on solar energy, where thermal energy is collected in a concentrating parabola dish and transported to a high temperature storage unit. There is a need for modelling natural flows in boiling systems as well as in heat pipes. See the link for some information on the solar project, which is a collaboration with African universities: http://www.ept.ntnu.no/NUFUSolar
Candidate
The candidate must have a strong interest in computational methods and programming. Suitable background can be within computational physics, fluid mechanics, mechanical or chemical engineering. Applicants for PhD grants should have an MSc or similar degree within relevant engineering or technology areas, and must be qualified for a PhD study at NTNU.
Further information can be obtained by contacting Professor Ole Jørgen Nydal, email: ole.j.nydal@ntnu.no.
Conditions of appointment:
PhD students follow code 1017, grade 43 – 47, gross NOK 325 600 to NOK 348 900 per year (before tax). PhD students are normally remunerated at wage level 43. There will be a 2 % deduction to the Norwegian Public Service Pension Fund from gross salary.
Engagement as a PhD candidate is done in accordance with current appointment regulations with supplementary rules in force giving guidelines for scholarship appointments in universities and university colleges. The goal of each of the announced positions is to obtain a PhD degree. Applicants are obliged to engage in an organized PhD training program, and appointment requires approval of the applicant’s plan for a PhD study within three months from the date of commencement. A contract of employment will be set up for the engagement period regulating the rights and duties of the PhD student.
The engagement is to be made in accordance with the regulations in force concerning State Employees and Civil Servants.
The positions adhere to the Norwegian Government’s policy of balanced ethnicity, age and gender. Persons with immigrant background and women are encouraged to apply.
The application must contain information of educational background and work experience. Copies of transcripts and reference letters should be enclosed.
An application inclusive CV, grade transcripts and
other enclosures should be sent electronically through
http://www.jobbnorge.no, ref.no. IVT-05/08. Preferably, we want the
attachments in one file. Application deadline: 1 March 2008.
