Normahira Mamat @ Mohamad Nor, Dr.
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/32958
This page provides access to scholarly publication by UniMAP Faculty members and researchers2023-01-29T12:31:16ZSimplified equations for saturated steam properties for simulation purpose
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/32228
Simplified equations for saturated steam properties for simulation purpose
Marwan, Affandi, Dr.; Normahira, Mamat @Mohamad Nor; Siti Nurul Aqmariah, Mohd Kanafiah; Nurul Syahirah, Khalid
Steam is a very important fluid in industries and its thermodynamic properties have been tabulated. Graphs showing various relationships of steam thermodynamics have also been developed. However, the use of tables or graphs has a particular drawback: interpolation is often necessary. For simulation purpose or real time system which often needs hundreds or even thousands of data, interpolation will become very tedious and time consuming. Formulas for thermodynamic properties of steam are available and can then be programmed in a computer, which will then compute the thermodynamic properties quickly. Unfortunately, formulas for thermodynamic properties of steam are quite complicated so programming them for a simple simulation purpose is quite difficult and is therefore inconveni ent. This paper shows the results from simplified equations for saturated steam properties. The equations which are developed in this paper are for saturated pressure and temperature, and for enthalpy, entropy, and specific volume in saturated liquid and saturated vapour states. The equations are developed from data given in the International Steam Tables. The accuracy for each equation is fairly small, less than 2% except for saturated liquid entropy which is 3.22%, which is good enough for most applications. Since the number of parameter used for each equation is just five, those equations developed can be conveniently used for simulation purpose.
Link to publisher's homepage at www.elsevier.com
2013-01-01T00:00:00ZSimplified equations for saturated steam properties for simulation purpose
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/30690
Simplified equations for saturated steam properties for simulation purpose
Marwan, Affandi; Normahira, Mamat; Siti Nurul Aqmariah, Mohd Kanafiah; Nurul Syahirah, Khalid
Steam is a very important fluid in industries and its thermodynamic properties have been tabulated. Graphs showing various relationships of steam thermodynamics
have also been developed. However, the use of tables or graphs has a particular drawback: interpolation is often necessary. For simulation purpose or real time system
which often needs hundreds or even thousands of data,
interpolation will become very tedious and time consuming. Formulas for thermodynamic properties of steam are available and can then be programmed in a computer, which will then compute the thermodynamic properties
quickly. Unfortunately, formulas for thermodynamic properties of steam are quite complicated so programming them for a simple simulation purpose is quite difficult and is
therefore inconvenient. This paper shows the results from simplified equations for saturated steam properties. The equations which are developed in this paper are for
saturated pressure and temperature, and for enthalpy, entropy, and specific volume in saturated liquid and saturated vapour states. The equations are developed from data given in the International Steam Tables. The accuracy for each equation is fairly small, less than 2% except for saturated liquid entropy which is 3.22%, which is good
enough for most applications. Since the number of parameter used for each equation is just five, those equations developed can be conveniently used for simulation purpose.
Malaysian Technical Universities Conference on Engineering and Technology (MUCET) 2012 organised by technical universities under the Malaysian Technical Universities Network (MTUN), 20th - 21st November 2012 at Hotel Seri Malaysia, Kangar, Perlis.
2012-11-20T00:00:00ZNumerical measurement of contact pressure in the tibiofemoral joint during gait
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/20565
Numerical measurement of contact pressure in the tibiofemoral joint during gait
Normahira, Mamat @Mohamad Nor; Noor Azuan, Abu Osman; Atalullah, Oshkour
In this study, the mechanical responses for the knee
joint model in various degrees of flexion and loadings during gait
are investigated. Three gait phases consisting of heel strike (HS)
(5.5°), single limb stance (SLS) (15.5°), and toe-off (TO) (4.5°) are
considered to represent the gait cycle while simulated loading
conditions applied for each phase are 2.25 times body weight
(BW), 1.85 times BW, and 3.5 times BW, respectively, where the
BW is 495 N. The knee images are imported from a computerized
tomography (CT) scan to Mimics version 13.1 software for
smoothing and constructing to the three-dimensional (3D) model
of the tibio-femoral (TF) joint. Finite element analysis (FEA)
using the ABAQUS v.6.7 software was performed to simulate the
biomechanical patterns of the tibiofemoral (TF) joint. The knee
joint is modeled with femur condyles, tibia plateau, and menisci
attachment. The contact pressure toward these 3 components is
investigated at each medial and lateral compartment of the joint
parts. The simulating results are verified and compared with
well-known results in the literatures, which showed that contact
pressure behaved much greater on the medial compartments
than on the lateral compartments throughout the phases.
Meanwhile, it was found that the peak contact pressure occurred
during TO.
Link to publisher's homepage at http://ieeexplore.ieee.org/
2012-02-27T00:00:00Z